650
San Mateo, California
California · Pacific (UTC-8) · — · 15 cities
Cities Served by Area Code 650 (15 cities)
Additional Details
Established
1997
Type
Split
Active Prefixes
722
Wireless Lines
31%
About Area Code 650
Area code 650 was created in 1997 as a split from a previously larger area code region. It serves the San Mateo, California metropolitan area. The area is in the Pacific time zone. It covers 15 cities and communities including Belmont, Burlingame, Daly City, Encourage City, Half Moon Bay and 10 more.
Phone Number Prefixes in Area Code 650
722 active NXX prefixes — 31% wireless, 69% landline. Each prefix (NXX) represents up to 10,000 phone numbers.
AT&T (Pacific Bell) 273 (38%)AT&T Mobility 59 (8%)T-Mobile 57 (8%)MCI/Verizon 57 (8%)Lumen/Level 3 51 (7%)
| Prefix | Carrier | Type | Rate Center |
|---|---|---|---|
| 650-200 | Twilio | Landline | San Mateo |
| 650-201 | T-Mobile | Wireless | Ssnfrncsco |
| 650-202 | Utility Telecom Group | Landline | San Mateo |
| 650-203 | Bandwidth.com | Landline | Mt View |
| 650-204 | Lumen/Level 3 | Landline | Millbrae |
| 650-205 | Usa Mobility Wireless | Wireless | Ssnfrncsco |
| 650-206 | U.S. Telepacific | Landline | Woodside |
| 650-207 | Verizon Wireless | Wireless | Redwood Cy |
| 650-208 | Verizon Wireless | Wireless | Redwood Cy |
| 650-209 | U.S. Telepacific | Landline | Los Altos |
| 650-210 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-211 | Multiple Ocn Listing | Landline | Xxxxxxxxxx |
| 650-212 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-213 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-214 | MCI/Verizon | Wireless | Mt View |
| 650-215 | Lumen/Level 3 | Landline | Mt View |
| 650-216 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-217 | Usa Mobility Wireless | Wireless | San Mateo |
| 650-218 | T-Mobile | Wireless | San Mateo |
| 650-219 | T-Mobile | Wireless | Ssnfrncsco |
| 650-220 | T-Mobile | Wireless | Mt View |
| 650-221 | Shelcomm | Landline | Ssnfrncsco |
| 650-222 | T-Mobile | Wireless | San Mateo |
| 650-223 | U.S. Telepacific | Landline | Palo Alto |
| 650-224 | AT&T Mobility | Wireless | Mt View |
| 650-225 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-226 | MCI/Verizon | Wireless | Sncrl-Blmt |
| 650-227 | MCI/Verizon | Wireless | San Mateo |
| 650-228 | MCI/Verizon | Wireless | Ssnfrncsco |
| 650-229 | MCI/Verizon | Wireless | Los Altos |
| 650-230 | MCI/Verizon | Wireless | Mt View |
| 650-231 | MCI/Verizon | Wireless | Millbrae |
| 650-232 | MCI/Verizon | Wireless | Sncrl-Blmt |
| 650-233 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-234 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-235 | MCI/Verizon | Wireless | San Mateo |
| 650-236 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-237 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-238 | MCI/Verizon | Wireless | Ssnfrncsco |
| 650-239 | Onvoy | Landline | Millbrae |
| 650-240 | Onvoy | Landline | San Mateo |
| 650-241 | Lumen/Level 3 | Landline | Redwood Cy |
| 650-242 | Lumen/Level 3 | Landline | San Mateo |
| 650-243 | U.S. Telepacific | Landline | Ssnfrncsco |
| 650-244 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-245 | AT&T Mobility | Wireless | San Mateo |
| 650-246 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-247 | Commio | Landline | Woodside |
| 650-248 | T-Mobile | Wireless | Palo Alto |
| 650-249 | Onvoy | Landline | Redwood Cy |
| 650-250 | T-Mobile | Wireless | Palo Alto |
| 650-251 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-252 | Peerless Network Of California | Landline | Palo Alto |
| 650-253 | MCI/Verizon | Wireless | Mt View |
| 650-254 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-255 | AT&T Mobility | Wireless | Ssnfrncsco |
| 650-256 | American Messaging Services | Landline | Ssnfrncsco |
| 650-257 | Lumen/Level 3 | Landline | Redwood Cy |
| 650-258 | Teleport Communications America | Landline | Palo Alto |
| 650-259 | AT&T (Pacific Bell) | Landline | Millbrae |
| 650-260 | AT&T | Landline | Redwood Cy |
| 650-261 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-262 | Lumen/Level 3 | Landline | Pescadero |
| 650-263 | MCI/Verizon | Wireless | Moss Beach |
| 650-264 | AT&T | Landline | Sncrl-Blmt |
| 650-265 | AT&T | Landline | Mt View |
| 650-266 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-267 | Lumen/Level 3 | Landline | Ssnfrncsco |
| 650-268 | MCI/Verizon | Wireless | Pescadero |
| 650-269 | Verizon Wireless | Wireless | Palo Alto |
| 650-270 | T-Mobile | Wireless | Ssnfrncsco |
| 650-271 | Metro by T-Mobile | Wireless | Snfc Junpr |
| 650-272 | MCI/Verizon | Wireless | Palo Alto |
| 650-273 | Astound Broadband | Landline | Ssnfrncsco |
| 650-274 | T-Mobile | Wireless | San Mateo |
| 650-275 | MCI/Verizon | Wireless | Woodside |
| 650-276 | Lumen/Level 3 | Landline | Halfmoonby |
| 650-277 | 33 Wireless | Wireless | Redwood Cy |
| 650-278 | T-Mobile | Wireless | Ssnfrncsco |
| 650-279 | Verizon Wireless | Wireless | Mt View |
| 650-280 | Metro by T-Mobile | Wireless | Mt View |
| 650-281 | T-Mobile | Wireless | San Mateo |
| 650-282 | Astound Broadband | Landline | Mt View |
| 650-283 | T-Mobile | Wireless | Palo Alto |
| 650-284 | T-Mobile | Wireless | Halfmoonby |
| 650-285 | Bandwidth.com | Landline | Palo Alto |
| 650-286 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-287 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-288 | Lumen/Level 3 | Landline | San Mateo |
| 650-289 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-290 | Metro by T-Mobile | Wireless | Pacifica |
| 650-291 | Verizon Wireless | Wireless | Ssnfrncsco |
| 650-292 | Lumen/Level 3 | Landline | San Mateo |
| 650-293 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-294 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-295 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-296 | AT&T Mobility | Wireless | Ssnfrncsco |
| 650-297 | Lumen/Level 3 | Landline | Pescadero |
| 650-298 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-299 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-300 | Onvoy | Landline | Palo Alto |
| 650-301 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-302 | AT&T Mobility | Wireless | Millbrae |
| 650-303 | AT&T Mobility | Wireless | Ssnfrncsco |
| 650-304 | AT&T Mobility | Wireless | Palo Alto |
| 650-305 | T-Mobile | Wireless | Los Altos |
| 650-306 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-307 | T-Mobile | Wireless | Millbrae |
| 650-308 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-309 | T-Mobile | Wireless | Halfmoonby |
| 650-311 | Multiple Ocn Listing | Landline | Xxxxxxxxxx |
| 650-312 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-313 | Rclec | Landline | Palo Alto |
| 650-314 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-315 | T-Mobile | Wireless | San Mateo |
| 650-316 | Teleport Communications America | Landline | Mt View |
| 650-317 | Usa Mobility Wireless | Wireless | Mt View |
| 650-318 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-319 | MCI/Verizon | Wireless | Palo Alto |
| 650-320 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-321 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-322 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-323 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-324 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-325 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-326 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-327 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-328 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-329 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-330 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-331 | Lumen/Level 3 | Landline | Palo Alto |
| 650-332 | Lumen/Level 3 | Landline | Woodside |
| 650-333 | T-Mobile | Wireless | Ssnfrncsco |
| 650-334 | T-Mobile | Wireless | Palo Alto |
| 650-335 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-336 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-337 | Onvoy | Landline | Pescadero |
| 650-338 | T-Mobile | Wireless | Halfmoonby |
| 650-339 | Verizon Wireless | Wireless | Sncrl-Blmt |
| 650-340 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-341 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-342 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-343 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-344 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-345 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-346 | T-Mobile | Wireless | San Mateo |
| 650-347 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-348 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-349 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-350 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-351 | Lumen/Level 3 | Landline | Ssnfrncsco |
| 650-352 | Lumen/Level 3 | Landline | Palo Alto |
| 650-353 | Lumen/Level 3 | Landline | Palo Alto |
| 650-354 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-355 | AT&T (Pacific Bell) | Landline | Pacifica |
| 650-356 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-357 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-358 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-359 | AT&T (Pacific Bell) | Landline | Pacifica |
| 650-360 | Onvoy | Landline | Ssnfrncsco |
| 650-361 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-362 | MCI/Verizon | Wireless | Redwood Cy |
| 650-363 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-364 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-365 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-366 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-367 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-368 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-369 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-370 | Bandwidth.com | Landline | Palo Alto |
| 650-371 | Usa Mobility Wireless | Wireless | San Mateo |
| 650-372 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-373 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-374 | AT&T Mobility | Wireless | Palo Alto |
| 650-375 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-376 | Lumen/Level 3 | Landline | San Mateo |
| 650-377 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-378 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-379 | MCI/Verizon | Wireless | Ssnfrncsco |
| 650-380 | Verizon Wireless | Wireless | Palo Alto |
| 650-381 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-382 | Lumen/Level 3 | Landline | Palo Alto |
| 650-383 | Teleport Communications America | Landline | Los Altos |
| 650-384 | Teleport Communications America | Landline | Palo Alto |
| 650-385 | Teleport Communications America | Landline | Redwood Cy |
| 650-386 | Teleport Communications America | Landline | Mt View |
| 650-387 | AT&T Mobility | Wireless | Palo Alto |
| 650-388 | MCI/Verizon | Wireless | Palo Alto |
| 650-389 | MCI/Verizon | Wireless | San Mateo |
| 650-390 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-391 | Lumen/Level 3 | Landline | Palo Alto |
| 650-392 | Lumen/Level 3 | Landline | Ssnfrncsco |
| 650-393 | Lumen/Level 3 | Landline | San Mateo |
| 650-394 | Lumen/Level 3 | Landline | Sncrl-Blmt |
| 650-395 | Lumen/Level 3 | Landline | Redwood Cy |
| 650-396 | T-Mobile | Wireless | Mt View |
| 650-397 | Bandwidth.com | Landline | Los Altos |
| 650-398 | Verizon Wireless | Wireless | San Mateo |
| 650-399 | Onvoy | Landline | Redwood Cy |
| 650-400 | Verizon Wireless | Wireless | Redwood Cy |
| 650-401 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-402 | T-Mobile | Wireless | Halfmoonby |
| 650-403 | MCI/Verizon | Wireless | San Mateo |
| 650-404 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-405 | AT&T Mobility | Wireless | Los Altos |
| 650-406 | American Messaging Services | Landline | Mt View |
| 650-407 | Verizon Wireless | Wireless | Palo Alto |
| 650-408 | AT&T Mobility | Wireless | Mt View |
| 650-409 | U.S. Telepacific | Landline | Millbrae |
| 650-410 | Onvoy | Landline | Ssnfrncsco |
| 650-411 | Multiple Ocn Listing | Landline | Xxxxxxxxxx |
| 650-412 | MCI/Verizon | Wireless | Sncrl-Blmt |
| 650-413 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-414 | Teleport Communications America | Landline | Redwood Cy |
| 650-416 | U.S. Telepacific | Landline | Ssnfrncsco |
| 650-417 | U.S. Telepacific | Landline | Mt View |
| 650-418 | Verizon Wireless | Wireless | San Mateo |
| 650-419 | Lumen/Level 3 | Landline | La Honda |
| 650-420 | T-Mobile | Wireless | Pacifica |
| 650-421 | U.S. Telepacific | Landline | Redwood Cy |
| 650-422 | Verizon Wireless | Wireless | Palo Alto |
| 650-423 | Utility Telecom Group | Landline | Redwood Cy |
| 650-424 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-425 | MCI/Verizon | Wireless | San Mateo |
| 650-426 | MCI/Verizon | Wireless | Mt View |
| 650-427 | MCI/Verizon | Wireless | Palo Alto |
| 650-428 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-429 | MCI/Verizon | Wireless | Mt View |
| 650-430 | T-Mobile | Wireless | San Mateo |
| 650-431 | T-Mobile | Wireless | San Mateo |
| 650-432 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-433 | MCI/Verizon | Wireless | Palo Alto |
| 650-434 | U.S. Telepacific | Landline | Woodside |
| 650-435 | Verizon Wireless | Wireless | San Mateo |
| 650-436 | AT&T Mobility | Wireless | San Mateo |
| 650-437 | Bandwidth.com | Landline | San Mateo |
| 650-438 | AT&T Mobility | Wireless | Ssnfrncsco |
| 650-439 | AT&T Mobility | Wireless | Mt View |
| 650-440 | T-Mobile | Wireless | Halfmoonby |
| 650-441 | Verizon Wireless | Wireless | Palo Alto |
| 650-442 | Bandwidth.com | Landline | Ssnfrncsco |
| 650-443 | U.S. Telepacific | Landline | Millbrae |
| 650-444 | T-Mobile | Wireless | Palo Alto |
| 650-445 | T-Mobile | Wireless | San Mateo |
| 650-446 | Bandwidth.com | Landline | Woodside |
| 650-447 | T-Mobile | Wireless | Mt View |
| 650-448 | Peerless Network Of California | Landline | Mt View |
| 650-449 | MCI/Verizon | Wireless | Snfc Junpr |
| 650-450 | AT&T Mobility | Wireless | Mt View |
| 650-451 | T-Mobile | Wireless | Pacifica |
| 650-452 | AT&T | Landline | Ssnfrncsco |
| 650-453 | Lumen/Level 3 | Landline | Sncrl-Blmt |
| 650-454 | AT&T Mobility | Wireless | Redwood Cy |
| 650-455 | AT&T Mobility | Wireless | Millbrae |
| 650-456 | Onvoy | Landline | Pescadero |
| 650-457 | AT&T Mobility | Wireless | Ssnfrncsco |
| 650-458 | Astound Broadband | Landline | San Mateo |
| 650-459 | Bandwidth.com | Landline | Halfmoonby |
| 650-460 | AT&T Mobility | Wireless | Palo Alto |
| 650-461 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-462 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-463 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-464 | Verizon Wireless | Wireless | Redwood Cy |
| 650-465 | Verizon Wireless | Wireless | Redwood Cy |
| 650-466 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-467 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-468 | T-Mobile | Wireless | Palo Alto |
| 650-469 | MCI/Verizon | Wireless | Los Altos |
| 650-470 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-471 | U.S. Telepacific | Landline | Los Altos |
| 650-472 | Lumen/Level 3 | Landline | Los Altos |
| 650-473 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-474 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-475 | MCI/Verizon | Wireless | Palo Alto |
| 650-476 | T-Mobile | Wireless | Halfmoonby |
| 650-477 | Verizon Wireless | Wireless | San Mateo |
| 650-478 | AT&T (Pacific Bell) | Landline | Snfc Cntrl |
| 650-479 | U.S. Telepacific | Landline | Halfmoonby |
| 650-480 | MCI/Verizon | Wireless | Redwood Cy |
| 650-481 | MCI/Verizon | Wireless | Redwood Cy |
| 650-482 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-483 | AT&T Mobility | Wireless | San Mateo |
| 650-484 | AT&T Mobility | Wireless | San Mateo |
| 650-485 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-486 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-487 | U.S. Telepacific | Landline | La Honda |
| 650-488 | Teleport Communications America | Landline | Snfc Junpr |
| 650-489 | Lumen/Level 3 | Landline | Sncrl-Blmt |
| 650-490 | AT&T Mobility | Wireless | Millbrae |
| 650-491 | Lumen/Level 3 | Landline | Ssnfrncsco |
| 650-492 | AT&T Mobility | Wireless | Los Altos |
| 650-493 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-494 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-495 | T-Mobile | Wireless | Mt View |
| 650-496 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-497 | Lumen/Level 3 | Landline | Palo Alto |
| 650-498 | Lumen/Level 3 | Landline | Palo Alto |
| 650-499 | Bandwidth.com | Landline | Mt View |
| 650-500 | American Messaging Services | Landline | Sncrl-Blmt |
| 650-501 | Bandwidth.com | Landline | Pacifica |
| 650-502 | Bandwidth.com | Landline | Ssnfrncsco |
| 650-503 | U.S. Telepacific | Landline | Redwood Cy |
| 650-504 | AT&T Mobility | Wireless | San Mateo |
| 650-505 | AT&T Mobility | Wireless | Palo Alto |
| 650-506 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-507 | T-Mobile | Wireless | Palo Alto |
| 650-508 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-509 | Verizon Wireless | Wireless | Palo Alto |
| 650-511 | Multiple Ocn Listing | Landline | Xxxxxxxxxx |
| 650-512 | AT&T Mobility | Wireless | Palo Alto |
| 650-513 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-514 | Lumen/Level 3 | Landline | San Mateo |
| 650-515 | Lumen/Level 3 | Landline | Ssnfrncsco |
| 650-516 | U.S. Telepacific | Landline | Pacifica |
| 650-517 | U.S. Telepacific | Landline | Sncrl-Blmt |
| 650-518 | Metro by T-Mobile | Wireless | Los Altos |
| 650-519 | AT&T Mobility | Wireless | Palo Alto |
| 650-520 | T-Mobile | Wireless | San Mateo |
| 650-521 | Comcast | Landline | Palo Alto |
| 650-522 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-523 | Onvoy | Landline | San Mateo |
| 650-524 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-525 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-526 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-527 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-528 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-529 | AT&T (Pacific Bell) | Landline | Woodside |
| 650-530 | Teleport Communications America | Landline | Woodside |
| 650-531 | Verizon Wireless | Wireless | Palo Alto |
| 650-532 | U.S. Telepacific | Landline | San Mateo |
| 650-533 | Metro by T-Mobile | Wireless | San Mateo |
| 650-534 | MCI/Verizon | Wireless | Ssnfrncsco |
| 650-535 | U.S. Telepacific | Landline | Moss Beach |
| 650-536 | Telnyx | Landline | Snfc Junpr |
| 650-537 | T-Mobile | Wireless | Mt View |
| 650-538 | U.S. Telepacific | Landline | Pescadero |
| 650-539 | T-Mobile | Wireless | San Mateo |
| 650-540 | Teleport Communications America | Landline | Ssnfrncsco |
| 650-541 | AT&T Mobility | Wireless | San Mateo |
| 650-542 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-543 | U.S. Telepacific | Landline | Palo Alto |
| 650-544 | T-Mobile | Wireless | San Mateo |
| 650-545 | North County Communication Corporation - Ca | Landline | Mt View |
| 650-546 | Teleport Communications America | Landline | Palo Alto |
| 650-547 | AT&T Mobility | Wireless | Woodside |
| 650-548 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-549 | MCI/Verizon | Wireless | Redwood Cy |
| 650-550 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-551 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-552 | AT&T (Pacific Bell) | Landline | Millbrae |
| 650-553 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-554 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-555 | Multiple Ocn Listing | Landline | Dir Asst |
| 650-556 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-557 | AT&T (Pacific Bell) | Landline | Pacifica |
| 650-558 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-559 | AT&T (Pacific Bell) | Landline | Los Altos |
| 650-560 | AT&T (Pacific Bell) | Landline | Halfmoonby |
| 650-561 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-562 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-563 | AT&T (Pacific Bell) | Landline | Moss Beach |
| 650-564 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-565 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-566 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-567 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-568 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-569 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-570 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-571 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-572 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-573 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-574 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-575 | AT&T Mobility | Wireless | Palo Alto |
| 650-576 | AT&T Mobility | Wireless | San Mateo |
| 650-577 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-578 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-579 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-580 | AT&T Mobility | Wireless | Ssnfrncsco |
| 650-581 | Teleport Communications America | Landline | San Mateo |
| 650-582 | Telnyx | Landline | Mt View |
| 650-583 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-584 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-585 | Lumen/Level 3 | Landline | Sncrl-Blmt |
| 650-586 | Telnyx | Landline | Palo Alto |
| 650-587 | Lumen/Level 3 | Landline | Redwood Cy |
| 650-588 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-589 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-590 | Onvoy | Landline | Sncrl-Blmt |
| 650-591 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-592 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-593 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-594 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-595 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-596 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-597 | Utility Telecom Group | Landline | Sncrl-Blmt |
| 650-598 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-599 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-600 | Onvoy | Landline | Palo Alto |
| 650-602 | Verizon Wireless | Wireless | Mt View |
| 650-603 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-604 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-605 | MCI/Verizon | Wireless | Mt View |
| 650-606 | Spectrum | Landline | Palo Alto |
| 650-607 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-608 | Verizon Wireless | Wireless | Snfc Junpr |
| 650-609 | T-Mobile | Wireless | Millbrae |
| 650-610 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-611 | Multiple Ocn Listing | Landline | Xxxxxxxxxx |
| 650-612 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-613 | T-Mobile | Wireless | Palo Alto |
| 650-614 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-615 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-616 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-617 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-618 | Onvoy | Landline | Palo Alto |
| 650-619 | AT&T Mobility | Wireless | San Mateo |
| 650-620 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-621 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-622 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-623 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-624 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-625 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-627 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-628 | MCI/Verizon | Wireless | Sncrl-Blmt |
| 650-629 | Fractel | Landline | San Mateo |
| 650-630 | Metro by T-Mobile | Wireless | Palo Alto |
| 650-631 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-632 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-633 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-634 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-635 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-636 | MCI/Verizon | Wireless | Ssnfrncsco |
| 650-637 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-638 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-639 | AT&T Mobility | Wireless | San Mateo |
| 650-640 | AT&T Mobility | Wireless | Sncrl-Blmt |
| 650-641 | Lumen/Level 3 | Landline | Mt View |
| 650-642 | T-Mobile | Wireless | San Mateo |
| 650-643 | T-Mobile | Wireless | Palo Alto |
| 650-644 | AT&T Mobility | Wireless | Palo Alto |
| 650-645 | Teleport Communications America | Landline | San Mateo |
| 650-646 | T-Mobile | Wireless | Palo Alto |
| 650-647 | Verizon Wireless | Wireless | Redwood Cy |
| 650-648 | MCI/Verizon | Wireless | Millbrae |
| 650-649 | Onvoy | Landline | Redwood Cy |
| 650-650 | Onvoy | Landline | San Mateo |
| 650-651 | MCI/Verizon | Wireless | Millbrae |
| 650-652 | AT&T (Pacific Bell) | Landline | Millbrae |
| 650-653 | MCI/Verizon | Wireless | San Mateo |
| 650-654 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-655 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-656 | Lumen/Level 3 | Landline | Palo Alto |
| 650-658 | Onvoy | Landline | Woodside |
| 650-659 | Spectrum | Landline | San Mateo |
| 650-660 | T-Mobile | Wireless | Halfmoonby |
| 650-661 | T-Mobile | Wireless | Pacifica |
| 650-662 | Hd Carrier | Landline | La Honda |
| 650-663 | AT&T Mobility | Wireless | Pacifica |
| 650-664 | Verizon Wireless | Wireless | Mt View |
| 650-665 | Verizon Wireless | Wireless | Palo Alto |
| 650-666 | Lumen/Level 3 | Landline | Palo Alto |
| 650-667 | AT&T Mobility | Wireless | San Mateo |
| 650-668 | Fractel | Landline | Los Altos |
| 650-669 | Metro by T-Mobile | Wireless | Mt View |
| 650-670 | Onvoy | Landline | Redwood Cy |
| 650-671 | T-Mobile | Wireless | Ssnfrncsco |
| 650-672 | Onvoy | Landline | Millbrae |
| 650-673 | AT&T | Landline | La Honda |
| 650-674 | Bandwidth.com | Landline | Sncrl-Blmt |
| 650-675 | T-Mobile | Wireless | Pacifica |
| 650-676 | Utility Telecom Group | Landline | Ssnfrncsco |
| 650-677 | Fractel | Landline | Ssnfrncsco |
| 650-678 | Verizon Wireless | Wireless | San Mateo |
| 650-679 | Astound Broadband | Landline | Redwood Cy |
| 650-680 | T-Mobile | Wireless | Los Altos |
| 650-681 | U.S. Telepacific | Landline | Palo Alto |
| 650-682 | Utility Telecom Group | Landline | Palo Alto |
| 650-683 | Lumen/Level 3 | Landline | Woodside |
| 650-684 | Lumen/Level 3 | Landline | Millbrae |
| 650-685 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-686 | MCI/Verizon | Wireless | Millbrae |
| 650-687 | MCI/Verizon | Wireless | Palo Alto |
| 650-688 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-689 | Teleport Communications America | Landline | Millbrae |
| 650-690 | AT&T | Landline | Palo Alto |
| 650-691 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-692 | AT&T (Pacific Bell) | Landline | Millbrae |
| 650-693 | Teleport Communications America | Landline | Mt View |
| 650-694 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-695 | Bandwidth.com | Landline | Mt View |
| 650-696 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-697 | AT&T (Pacific Bell) | Landline | Millbrae |
| 650-698 | T-Mobile | Wireless | Palo Alto |
| 650-699 | Fractel | Landline | San Mateo |
| 650-700 | Landline | ||
| 650-701 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-702 | Nuso | Landline | Palo Alto |
| 650-703 | AT&T Mobility | Wireless | San Mateo |
| 650-704 | AT&T Mobility | Wireless | Palo Alto |
| 650-705 | T-Mobile | Wireless | Mt View |
| 650-706 | Onvoy | Landline | San Mateo |
| 650-708 | Onvoy | Landline | Ssnfrncsco |
| 650-709 | Airespring | Landline | Palo Alto |
| 650-710 | Onvoy | Landline | Snfc Junpr |
| 650-711 | Multiple Ocn Listing | Landline | Xxxxxxxxxx |
| 650-712 | AT&T (Pacific Bell) | Landline | Halfmoonby |
| 650-713 | MCI/Verizon | Wireless | Halfmoonby |
| 650-714 | AT&T Mobility | Wireless | Palo Alto |
| 650-715 | Onvoy | Landline | San Mateo |
| 650-716 | MCI/Verizon | Wireless | Redwood Cy |
| 650-718 | Teleport Communications America | Landline | Moss Beach |
| 650-719 | MCI/Verizon | Wireless | Moss Beach |
| 650-720 | MCI/Verizon | Wireless | Halfmoonby |
| 650-721 | Lumen/Level 3 | Landline | Palo Alto |
| 650-722 | Verizon Wireless | Wireless | Redwood Cy |
| 650-723 | Lumen/Level 3 | Landline | Palo Alto |
| 650-724 | Lumen/Level 3 | Landline | Palo Alto |
| 650-725 | Lumen/Level 3 | Landline | Palo Alto |
| 650-726 | AT&T (Pacific Bell) | Landline | Halfmoonby |
| 650-727 | Bandwidth.com | Landline | San Mateo |
| 650-728 | AT&T (Pacific Bell) | Landline | Moss Beach |
| 650-729 | Teleport Communications America | Landline | Halfmoonby |
| 650-730 | Verizon Wireless | Wireless | Sncrl-Blmt |
| 650-731 | Astound Broadband | Landline | Snfc Junpr |
| 650-732 | Verizon Wireless | Wireless | Millbrae |
| 650-733 | MCI/Verizon | Wireless | Pacifica |
| 650-734 | Onvoy | Landline | Redwood Cy |
| 650-735 | Teleport Communications America | Landline | Pacifica |
| 650-736 | Lumen/Level 3 | Landline | Palo Alto |
| 650-737 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-738 | AT&T (Pacific Bell) | Landline | Pacifica |
| 650-739 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-740 | AT&T Mobility | Wireless | San Mateo |
| 650-741 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-742 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-743 | AT&T Mobility | Wireless | Redwood Cy |
| 650-744 | Fractel | Landline | Mt View |
| 650-745 | Teleport Communications America | Landline | Ssnfrncsco |
| 650-746 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-747 | AT&T (Pacific Bell) | Landline | La Honda |
| 650-748 | Teleport Communications America | Landline | La Honda |
| 650-749 | MCI/Verizon | Wireless | La Honda |
| 650-750 | Onvoy | Landline | Halfmoonby |
| 650-751 | Boost Subscriberco | Wireless | Woodside |
| 650-752 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-753 | T-Mobile | Wireless | San Mateo |
| 650-754 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-755 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-756 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-757 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-758 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-759 | Verizon Wireless | Wireless | San Mateo |
| 650-760 | Teleport Communications America | Landline | Ssnfrncsco |
| 650-761 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-762 | AT&T (Pacific Bell) | Landline | San Mateo |
| 650-763 | Lumen/Level 3 | Landline | Ssnfrncsco |
| 650-764 | Onvoy | Landline | Mt View |
| 650-766 | AT&T Mobility | Wireless | San Mateo |
| 650-768 | Paetec Itel | Landline | Los Altos |
| 650-769 | MCI/Verizon | Wireless | Sncrl-Blmt |
| 650-770 | Onvoy | Landline | Los Altos |
| 650-771 | Metro by T-Mobile | Wireless | Redwood Cy |
| 650-772 | T-Mobile | Wireless | Mt View |
| 650-773 | Verizon Wireless | Wireless | San Mateo |
| 650-774 | Onvoy | Landline | Los Altos |
| 650-776 | Metro by T-Mobile | Wireless | Palo Alto |
| 650-777 | AT&T (Pacific Bell) | Landline | Millbrae |
| 650-779 | Teleport Communications America | Landline | Redwood Cy |
| 650-780 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-781 | Bandwidth.com | Landline | San Mateo |
| 650-782 | Ton80 Communications | Landline | Los Altos |
| 650-784 | T-Mobile | Wireless | Ssnfrncsco |
| 650-785 | Verizon Wireless | Wireless | Palo Alto |
| 650-786 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-787 | AT&T Mobility | Wireless | San Mateo |
| 650-788 | Fractel | Landline | Palo Alto |
| 650-789 | Fractel | Landline | Mt View |
| 650-793 | Verizon Wireless | Wireless | Mt View |
| 650-794 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-795 | MCI/Verizon | Wireless | La Honda |
| 650-796 | AT&T Mobility | Wireless | Palo Alto |
| 650-797 | AT&T Mobility | Wireless | Ssnfrncsco |
| 650-798 | Teleport Communications America | Landline | Palo Alto |
| 650-799 | AT&T Mobility | Wireless | Palo Alto |
| 650-800 | Onvoy | Landline | Palo Alto |
| 650-801 | Teleport Communications America | Landline | Sncrl-Blmt |
| 650-802 | AT&T (Pacific Bell) | Landline | Sncrl-Blmt |
| 650-804 | AT&T Mobility | Wireless | Palo Alto |
| 650-808 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-810 | U.S. Telepacific | Landline | Mt View |
| 650-811 | Multiple Ocn Listing | Landline | Xxxxxxxxxx |
| 650-812 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-813 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-814 | Metro by T-Mobile | Wireless | Palo Alto |
| 650-815 | MCI/Verizon | Wireless | Palo Alto |
| 650-817 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-820 | Spectrum | Landline | Redwood Cy |
| 650-821 | Teleport Communications America | Landline | Ssnfrncsco |
| 650-822 | Onvoy | Landline | Ssnfrncsco |
| 650-823 | AT&T Mobility | Wireless | Los Altos |
| 650-825 | MCI/Verizon | Wireless | Ssnfrncsco |
| 650-826 | T-Mobile | Wireless | Ssnfrncsco |
| 650-827 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-829 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-830 | Lumen/Level 3 | Landline | Sncrl-Blmt |
| 650-832 | U.S. Telepacific | Landline | Sncrl-Blmt |
| 650-833 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-834 | Metro by T-Mobile | Wireless | Ssnfrncsco |
| 650-835 | Ip Horizon | Landline | Ssnfrncsco |
| 650-836 | Lumen/Level 3 | Landline | Pescadero |
| 650-837 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-838 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-839 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-842 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-843 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-844 | Fractel | Landline | San Mateo |
| 650-845 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-846 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-847 | MCI/Verizon | Wireless | Palo Alto |
| 650-849 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-850 | MCI/Verizon | Wireless | Woodside |
| 650-851 | AT&T (Pacific Bell) | Landline | Woodside |
| 650-852 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-853 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-854 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-855 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-856 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-857 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-858 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-859 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-860 | Lumen/Level 3 | Landline | Pescadero |
| 650-861 | T-Mobile | Wireless | Mt View |
| 650-862 | AT&T Mobility | Wireless | Palo Alto |
| 650-863 | AT&T Mobility | Wireless | San Mateo |
| 650-864 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-865 | AT&T Mobility | Wireless | San Mateo |
| 650-866 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-867 | AT&T Mobility | Wireless | San Mateo |
| 650-868 | AT&T Mobility | Wireless | Redwood Cy |
| 650-869 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-870 | Bandwidth.com | Landline | Ssnfrncsco |
| 650-871 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-872 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-873 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-874 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-875 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-876 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-877 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-878 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-879 | AT&T (Pacific Bell) | Landline | Pescadero |
| 650-880 | AT&T Mobility | Wireless | Mt View |
| 650-881 | Teleport Communications America | Landline | Pescadero |
| 650-882 | Onvoy | Landline | Pescadero |
| 650-885 | Lumen/Level 3 | Landline | Palo Alto |
| 650-887 | Onvoy | Landline | Los Altos |
| 650-888 | AT&T Mobility | Wireless | San Mateo |
| 650-889 | Ip Horizon | Landline | Halfmoonby |
| 650-892 | AT&T Mobility | Wireless | Ssnfrncsco |
| 650-897 | Lumen/Level 3 | Landline | Moss Beach |
| 650-898 | Comcast | Landline | Pacifica |
| 650-899 | Onvoy | Landline | La Honda |
| 650-900 | Onvoy | Landline | Los Altos |
| 650-903 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-906 | Metro by T-Mobile | Wireless | Palo Alto |
| 650-910 | Onvoy | Landline | Ssnfrncsco |
| 650-911 | Multiple Ocn Listing | Landline | Xxxxxxxxxx |
| 650-912 | Commio | Landline | Halfmoonby |
| 650-917 | AT&T (Pacific Bell) | Landline | Los Altos |
| 650-918 | AT&T | Landline | San Mateo |
| 650-919 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-921 | Metro by T-Mobile | Wireless | San Mateo |
| 650-922 | Verizon Wireless | Wireless | Ssnfrncsco |
| 650-924 | Metro by T-Mobile | Wireless | Palo Alto |
| 650-926 | AT&T (Pacific Bell) | Landline | Palo Alto |
| 650-930 | MCI/Verizon | Wireless | Mt View |
| 650-931 | U.S. Telepacific | Landline | San Mateo |
| 650-932 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-933 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-934 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-935 | MCI/Verizon | Wireless | Los Altos |
| 650-937 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-938 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-940 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-941 | AT&T (Pacific Bell) | Landline | Los Altos |
| 650-942 | Verizon Wireless | Wireless | Millbrae |
| 650-943 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-944 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-946 | Comcast | Landline | Los Altos |
| 650-947 | AT&T (Pacific Bell) | Landline | Los Altos |
| 650-948 | AT&T (Pacific Bell) | Landline | Los Altos |
| 650-949 | AT&T (Pacific Bell) | Landline | Los Altos |
| 650-950 | Landline | ||
| 650-952 | AT&T (Pacific Bell) | Landline | Ssnfrncsco |
| 650-954 | T-Mobile | Wireless | San Mateo |
| 650-955 | Fractel | Landline | Halfmoonby |
| 650-958 | Landline | ||
| 650-959 | Landline | ||
| 650-960 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-961 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-962 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-963 | Onvoy | Landline | Mt View |
| 650-964 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-965 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-966 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-967 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-968 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-969 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-976 | Landline | ||
| 650-977 | Fractel | Landline | Pacifica |
| 650-980 | MCI/Verizon | Wireless | Redwood Cy |
| 650-984 | Onvoy | Landline | Pacifica |
| 650-985 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-988 | AT&T (Pacific Bell) | Landline | Mt View |
| 650-989 | Lumen/Level 3 | Landline | Ssnfrncsco |
| 650-991 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-992 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-993 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-994 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-995 | AT&T (Pacific Bell) | Landline | Redwood Cy |
| 650-996 | AT&T Mobility | Wireless | Mt View |
| 650-997 | AT&T (Pacific Bell) | Landline | Snfc Junpr |
| 650-999 | Onvoy | Landline | Palo Alto |
All 40 area codes in California
About Area Code 650
Area code 650 popped up in 1997, right when the tech boom was heating up in California's Bay Area. Back then, the old codes were getting swamped with all the new folks moving in for jobs at startups and big companies, so they carved out 650 from an existing one to handle the overflow. It's all about that slice of the peninsula south of San Francisco, covering spots like San Mateo, where you might find yourself stuck in traffic heading to the beach, or Mountain View, buzzing with engineers tinkering away. This code serves 15 cities altogether, from the cozy suburbs of Belmont to the seaside vibes of Half Moon Bay. Picture driving down Highway 1, phone in hand, calling friends in Menlo Park about the latest gadget—it's that kind of place, where innovation meets the ocean. What sets 650 apart is its mix of high-tech hubs and laid-back coastal living; you've got Stanford nearby in Palo Alto, drawing brainy types, and quiet towns like Millbrae offering a breather from the city rush. If you're from here, you know the drill: quick chats about surf reports or software updates. It's not just numbers on a page—it's the heartbeat of a region that's always on the move, yet still holds onto that California charm.
⚠ Scam & Spam Alert for 650
In California, calls from 650 can sometimes bring unwanted surprises, like scammers trying to trick you. You might get hit with IRS scams, where someone pretends to be from the government demanding payment for taxes you don't owe. Then there's the auto warranty racket, with smooth talkers pushing fake extended plans for your car. Don't forget Medicare fraud, especially if you're older; they'll dangle offers for free medical gear that strings you along for your info. These pests are crafty, but they're not unbeatable. A good rule is to never give out personal details over the phone to unknown callers. Instead, take a beat, hang up, and verify any claims directly with the official source—that's a smart move to keep your info safe.
Local Snapshot
San Mateo County is home to about 770,000 people, making it a pretty crowded spot on the peninsula. Tech drives the economy here, with companies like Google in Mountain View pushing innovation forward every day. The area is famous for its stunning coastline, where you can catch waves at Half Moon Bay or just enjoy a sunset stroll. What's surprising is how pricey real estate gets; some neighborhoods in Menlo Park have homes costing millions, thanks to all those Silicon Valley bigwigs.
Frequently Asked Questions
Where is area code 650?
Area code 650 serves San Mateo and surrounding communities in California, including Belmont, Burlingame, Daly City, Encourage City, Half Moon Bay and 10 more. It is in the Pacific time zone.
What cities are in area code 650?
Area code 650 covers 15 cities in California: Belmont, Burlingame, Daly City, Encourage City, Half Moon Bay, Menlo Park, Millbrae, Mountain View, Pacifica, Palo Alto, and 5 more
What time zone is 650?
Area code 650 is in the Pacific time zone (UTC-8).
When was area code 650 created?
Area code 650 was established in 1997 as a geographic split from a larger area code region.
Is 650 a legitimate area code?
Yes, 650 is a valid, active area code assigned to San Mateo, California. However, scammers can spoof any area code, so receiving a call from 650 doesn't guarantee the caller is actually in this area.
Has area code 650 ever been split?
Area code 650 was created in 1997 as a split from area code 415 to serve the San Francisco Peninsula. This split helped manage the increasing demand for phone numbers in the region. It covers cities like Menlo Park and Daly City without any further splits since then.
What tech companies are based in the 650 area code?
Menlo Park in the 650 area code is the headquarters for Meta, formerly Facebook. Other firms like Tesla have operations in nearby locations within this code. The area also supports startups in Encourage City focused on software and hardware development.
What outdoor events occur in cities under area code 650?
Half Moon Bay in the 650 area code hosts the annual Pumpkin Festival, drawing visitors for its coastal setting. This event features local agriculture and community activities along the Pacific coast. Other cities like Burlingame offer parks for year-round outdoor gatherings.