301

Silver Spring, Maryland

Maryland · Eastern (UTC-5) · — · 11 cities · Overlay: 240

State
Maryland
Major City
Silver Spring
Time Zone
Eastern (UTC-5)
Current Local Time
—
Overlay Code
240
Cities Served
11

Cities Served by Area Code 301 (11 cities)

Bethesda+2 codesBowie+2 codesCollege Park+2 codesCumberland+2 codesFrederick+2 codesGaithersburg+2 codesGermantown+2 codesHagerstown+2 codesLaurel+2 codesRockville+2 codesSilver Spring+2 codes
Additional Details
Established
1947
Type
Original (1947)
Active Prefixes
800
Wireless Lines
21%

About Area Code 301

Area code 301 is one of the original 86 area codes established in 1947 when AT&T and the Bell System created the North American Numbering Plan. It has served the Silver Spring area for over 75 years. This area code shares its territory with overlay code 240, meaning callers must dial all 10 digits for local calls. The area is in the Eastern time zone. It covers 11 cities and communities including Bethesda, Bowie, College Park, Cumberland, Frederick and 6 more.

Phone Number Prefixes in Area Code 301

800 active NXX prefixes — 21% wireless, 79% landline. Each prefix (NXX) represents up to 10,000 phone numbers.

Verizon Maryland 465 (58%)Verizon Wireless 51 (6%)AT&T Mobility 47 (6%)MCI/Verizon 43 (5%)Teleport Communications America 33 (4%)
PrefixCarrierTypeRate Center
301-200Bandwidth.comLandlineIndianhead
301-201AT&T MobilityWirelessWsngtnzn10
301-202AT&T MobilityWirelessWshngtnzn2
301-203Verizon MarylandLandlineWshngtnzn6
301-204AT&T MobilityWirelessWshngtnzn2
301-205Verizon MarylandLandlineWsng238Z14
301-206Verizon MarylandLandlineWsng236Z13
301-207Usa Mobility WirelessWirelessWsng236Z13
301-208Verizon MarylandLandlineGaithersbg
301-209Verizon MarylandLandlineWshngtnzn4
301-210Verizon MarylandLandlineLaurel236
301-211Multiple Ocn ListingLandlineXxxxxxxxxx
301-212Verizon MarylandLandlineWsngtnzn10
301-213Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-214Verizon MarylandLandlineWshngtnzn2
301-215Verizon MarylandLandlineWshngtnzn2
301-216Verizon MarylandLandlineGaithersbg
301-217Verizon MarylandLandlineWsngtnzn10
301-218Verizon MarylandLandlineWsng236Z14
301-219AT&T MobilityWirelessWshngtnzn2
301-220Verizon MarylandLandlineWsng236Z13
301-221AT&T MobilityWirelessWshngtnzn2
301-222Paetec ItelLandlineWshngtnzn2
301-223Verizon MarylandLandlineWilliamspt
301-224Usa Mobility WirelessWirelessWshngtnzn2
301-225Teleport Communications AmericaLandlineWsng236Z14
301-226Verizon MarylandLandlineWshngtnzn4
301-227Verizon MarylandLandlineWshngtnzn2
301-228Verizon MarylandLandlineFrederick
301-229Verizon MarylandLandlineWshngtnzn2
301-230Verizon MarylandLandlineWsngtnzn11
301-231Verizon MarylandLandlineWsngtnzn11
301-232MCI/VerizonWirelessAshton236
301-233Verizon WirelessWirelessWshngtnzn3
301-234Verizon MarylandLandlineWsngtnzn16
301-235MCI/VerizonWirelessWsngtnzn16
301-236Verizon MarylandLandlineWsngtnzn12
301-237Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-238Verizon MarylandLandlineWsngtnzn16
301-239Verizon MarylandLandlineWshngtnzn4
301-240Verizon MarylandLandlineWsngtnzn10
301-241Verizon MarylandLandlineHighfield
301-242MCI/VerizonWirelessBrandywine
301-243Verizon MarylandLandlineWshngtnzn2
301-244Paetec ItelLandlineWshngtnzn3
301-245Verizon MarylandLandlineBittinger
301-246Verizon MarylandLandlineNanjemoy
301-247AT&T MobilityWirelessLeonardtn
301-248Verizon MarylandLandlineWshngtnzn6
301-249Verizon MarylandLandlineWsng236Z14
301-250MCI/VerizonWirelessGaithersbg
301-251Verizon MarylandLandlineWsngtnzn10
301-252Metro by T-MobileWirelessGaithersbg
301-253Verizon MarylandLandlineDamascs236
301-254Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-255Verizon MarylandLandlineWsngtnzn11
301-256MCI/VerizonWirelessLaurel236
301-257Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-258Verizon MarylandLandlineWsngtnzn10
301-259Verizon MarylandLandlineTompkinsvl
301-260Verizon MarylandLandlineAshton236
301-261Verizon MarylandLandlineWsng238Z14
301-262Verizon MarylandLandlineWsng236Z14
301-263Verizon MarylandLandlineWshngtnzn2
301-264Verizon MarylandLandlineMt Savage
301-265Verizon MarylandLandlineWshngtnzn6
301-266AT&T MobilityWirelessWaldorf
301-267Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-268Uscoc Of CumberlandLandlineCumberland
301-269MCI/VerizonWirelessWshngtnzn2
301-270Verizon MarylandLandlineWshngtnzn3
301-271Verizon MarylandLandlineThurmont
301-272MCI/VerizonWirelessWshngtnzn2
301-273MCI/VerizonWirelessWshngtnzn3
301-274Verizon MarylandLandlineHughesvl
301-275AT&T MobilityWirelessWshngtnzn2
301-276MCI/VerizonWirelessWshngtnzn4
301-277Verizon MarylandLandlineWshngtnzn4
301-278MCI/VerizonWirelessWshngtnzn5
301-279Verizon MarylandLandlineWsngtnzn10
301-280Verizon MarylandLandlineWshngtnzn2
301-281MCI/VerizonWirelessWshngtnzn6
301-282Verizon MarylandLandlineWsngtnzn12
301-283Verizon MarylandLandlineWshngtnzn6
301-284MCI/VerizonWirelessWsngtnzn10
301-285Verizon MarylandLandlineWshngtnzn3
301-286Verizon MarylandLandlineWsng236Z13
301-287MCI/VerizonWirelessWsngtnzn11
301-288MCI/VerizonWirelessWsngtnzn12
301-289MCI/VerizonWirelessWsng236Z13
301-290Verizon MarylandLandlineMechancsvl
301-291MCI/VerizonWirelessWsng236Z14
301-292Verizon MarylandLandlineWshngtnzn6
301-293Verizon MarylandLandlineMyersville
301-294Verizon MarylandLandlineWsngtnzn10
301-295Verizon MarylandLandlineWshngtnzn2
301-296MCI/VerizonWirelessWsngtnzn10
301-297Verizon MarylandLandlineWsngtnzn16
301-298MCI/VerizonWirelessWsng236Z15
301-299Verizon MarylandLandlineWsngtnzn10
301-300Verizon WirelessWirelessWshngtnzn2
301-301OnvoyLandlineGaithersbg
301-302Metro by T-MobileWirelessHagerstown
301-303Usa Mobility WirelessWirelessWsng236Z13
301-304ComcastLandlineWalkersvl
301-305Metro by T-MobileWirelessFrederick
301-306Verizon MarylandLandlineWshngtnzn4
301-307Verizon MarylandLandlineWsng238Z13
301-308Usa Mobility WirelessWirelessWsng236Z13
301-309Verizon MarylandLandlineWsngtnzn10
301-310Verizon MarylandLandlineLaurel238
301-311Multiple Ocn ListingLandlineXxxxxxxxxx
301-312AT&T MobilityWirelessWshngtnzn2
301-313Verizon MarylandLandlineWsng236Z13
301-314Paetec ItelLandlineWshngtnzn4
301-315Verizon MarylandLandlineWsngtnzn10
301-316Verizon MarylandLandlineWshngtnzn5
301-317Verizon MarylandLandlineLaurel236
301-318AT&T MobilityWirelessWshngtnzn2
301-319Verizon MarylandLandlineWshngtnzn2
301-320Verizon MarylandLandlineWshngtnzn2
301-321OnvoyLandlineWsngtnzn11
301-322Verizon MarylandLandlineWshngtnzn4
301-323Lumen/Level 3LandlineLaurel236
301-324Verizon MarylandLandlineWshngtnzn5
301-325Verizon WirelessWirelessWshngtnzn3
301-326Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-327ComcastLandlineWsng238Z15
301-328ComcastLandlineWshngtnzn3
301-329OnvoyLandlineAshton238
301-330Verizon MarylandLandlineGaithersbg
301-331AT&T MobilityWirelessHagerstown
301-332AT&T MobilityWirelessWshngtnzn3
301-333Verizon MarylandLandlineWshngtnzn5
301-334Verizon MarylandLandlineOakland
301-335AT&T MobilityWirelessWshngtnzn2
301-336Verizon MarylandLandlineWshngtnzn5
301-337MCI/VerizonWirelessGaithersbg
301-338Idt AmericaLandlineCumberland
301-339Paetec ItelLandlineWsngtnzn10
301-340Verizon MarylandLandlineWsngtnzn10
301-341Verizon MarylandLandlineWshngtnzn4
301-342Verizon MarylandLandlineLxtnpkgrml
301-343Metro by T-MobileWirelessWshngtnzn5
301-344Verizon MarylandLandlineWsng236Z13
301-345Verizon MarylandLandlineWsng236Z13
301-346AT&T MobilityWirelessWshngtnzn3
301-347Verizon MarylandLandlineWshngtnzn2
301-348MCI/VerizonWirelessWsngtnzn11
301-349Verizon MarylandLandlinePoolesvl
301-350Verizon MarylandLandlineWshngtnzn5
301-351Verizon WirelessWirelessWshngtnzn3
301-352Verizon MarylandLandlineWsng236Z14
301-353Verizon MarylandLandlineWsngtnzn10
301-354Teleport Communications AmericaLandlineWsngtnzn10
301-355Verizon MarylandLandlineGaithersbg
301-356VdlLandlineLaurel236
301-357Verizon WirelessWirelessWshngtnzn3
301-358Lumen/Level 3LandlineWsng236Z15
301-359Verizon MarylandLandlineWesternpt
301-360Verizon MarylandLandlineFrederick
301-361Lumen/Level 3LandlineWshngtnzn4
301-362Verizon MarylandLandlineLaurel236
301-363Lumen/Level 3LandlineDamascs240
301-364MCI/VerizonWirelessWshngtnzn4
301-365Verizon MarylandLandlineWshngtnzn2
301-366Metro by T-MobileWirelessGaithersbg
301-367Verizon WirelessWirelessWshngtnzn3
301-368Verizon MarylandLandlineDamascs236
301-369Verizon MarylandLandlineWsng236Z13
301-370Metro by T-MobileWirelessGaithersbg
301-371Verizon MarylandLandlineMiddletown
301-372Verizon MarylandLandlineWsngtnzn16
301-373Verizon MarylandLandlineLeonardtn
301-374Verizon MarylandLandlineWaldorf
301-375Verizon MarylandLandlineIndianhead
301-376Verizon MarylandLandlineLaurel236
301-377ComcastLandlineLaurel236
301-378ComcastLandlineFrederick
301-379Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-380Verizon MarylandLandlineWshngtnzn2
301-381OnvoyLandlineWshngtnzn2
301-382Verizon MarylandLandlineWsngtnzn11
301-383ComcastLandlineWsng236Z14
301-384Verizon MarylandLandlineWsngtnzn12
301-385AT&T MobilityWirelessWshngtnzn2
301-386Verizon MarylandLandlineWshngtnzn4
301-387Verizon MarylandLandlineOakland
301-388Verizon MarylandLandlineWsngtnzn12
301-389Lumen/Level 3LandlineWsng236Z13
301-390Verizon MarylandLandlineWsng236Z14
301-391Verizon MarylandLandlineDamascs236
301-392Verizon MarylandLandlineLa Plata
301-393Verizon MarylandLandlineHagerstown
301-394Verizon MarylandLandlineWshngtnzn3
301-395Verizon WirelessWirelessLaurel238
301-396Verizon MarylandLandlineWaldorf
301-397Verizon MarylandLandlineWsng236Z13
301-398Verizon MarylandLandlineWsngtnzn10
301-399Metro by T-MobileWirelessWaldorf
301-400Verizon MarylandLandlineWshngtnzn2
301-401AT&T MobilityWirelessFrederick
301-402Verizon MarylandLandlineWshngtnzn2
301-403Verizon MarylandLandlineWshngtnzn4
301-404Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-405Paetec ItelLandlineWshngtnzn4
301-406Usa Mobility WirelessWirelessWshngtnzn2
301-407Verizon MarylandLandlineGaithersbg
301-408Verizon MarylandLandlineWshngtnzn3
301-409SpectrumLandlineWshngtnzn2
301-410SpectrumLandlineWshngtnzn6
301-411Multiple Ocn ListingLandlineXxxxxxxxxx
301-412AT&T MobilityWirelessWshngtnzn2
301-413Verizon MarylandLandlineWsngtnzn11
301-414Verizon MarylandLandlineDamascs236
301-415Verizon MarylandLandlineWshngtnzn3
301-416Verizon MarylandLandlineMyersville
301-417Verizon MarylandLandlineWsngtnzn10
301-418Verizon MarylandLandlineFrederick
301-419Verizon MarylandLandlineWsng236Z13
301-420Verizon MarylandLandlineWshngtnzn5
301-421Verizon MarylandLandlineAshton236
301-422Verizon MarylandLandlineWshngtnzn4
301-423Verizon MarylandLandlineWshngtnzn5
301-424Verizon MarylandLandlineWsngtnzn10
301-425Verizon MarylandLandlineWsng236Z13
301-426Verizon MarylandLandlineWsng236Z13
301-427Verizon MarylandLandlineWshngtnzn3
301-428Verizon MarylandLandlineWsngtnzn10
301-429Verizon MarylandLandlineWshngtnzn4
301-430Verizon MarylandLandlineWsng236Z14
301-431Verizon MarylandLandlineWshngtnzn3
301-432Verizon MarylandLandlineKeedysvl
301-433Verizon MarylandLandlineWshngtnzn5
301-434Verizon MarylandLandlineWshngtnzn3
301-435Verizon MarylandLandlineWshngtnzn2
301-436Verizon MarylandLandlineWshngtnzn4
301-437Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-438Verizon MarylandLandlineWsngtnzn12
301-439Verizon MarylandLandlineWshngtnzn3
301-440Metro by T-MobileWirelessWshngtnzn5
301-441Verizon MarylandLandlineWsng236Z13
301-442Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-443Verizon MarylandLandlineWsngtnzn11
301-444Verizon MarylandLandlineWsngtnzn10
301-445Verizon MarylandLandlineWshngtnzn3
301-446Verizon MarylandLandlineWsng236Z13
301-447Verizon MarylandLandlineEmmitsburg
301-448ComcastLandlineWshngtnzn3
301-449Verizon MarylandLandlineWshngtnzn5
301-450AT&T MobilityWirelessWshngtnzn3
301-451Verizon MarylandLandlineWshngtnzn2
301-452Verizon WirelessWirelessWshngtnzn3
301-453Verizon MarylandLandlineKitzmiller
301-454Verizon MarylandLandlineWshngtnzn4
301-455Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-456ComcastLandlineWshngtnzn5
301-457Verizon MarylandLandlineWshngtnzn3
301-458Teleport Communications AmericaLandlineWshngtnzn4
301-459Verizon MarylandLandlineWshngtnzn4
301-460Verizon MarylandLandlineWsngtnzn11
301-461Verizon WirelessWirelessWsngtnzn10
301-462Metro by T-MobileWirelessMyersville
301-463Verizon MarylandLandlineLonaconing
301-464Verizon MarylandLandlineWsng236Z14
301-465Omnipoint Communications Cap OperationsLandlineMyersville
301-466Verizon WirelessWirelessWshngtnzn3
301-467Verizon WirelessWirelessWshngtnzn3
301-468Verizon MarylandLandlineWsngtnzn11
301-469Verizon MarylandLandlineWshngtnzn2
301-470Verizon MarylandLandlineWsng236Z14
301-471Verizon WirelessWirelessFrederick
301-472Verizon MarylandLandlineMechancsvl
301-473Verizon MarylandLandlineFrederick
301-474Verizon MarylandLandlineWsng236Z13
301-475Verizon MarylandLandlineLeonardtn
301-476Verizon MarylandLandlineAshton236
301-477ComcastLandlineWsng236Z13
301-478Verizon MarylandLandlineFlintstone
301-479MCI/VerizonWirelessWsng236Z13
301-480Verizon MarylandLandlineWshngtnzn2
301-481Verizon WirelessWirelessLeonardtn
301-482Verizon MarylandLandlineDamascs236
301-483Verizon MarylandLandlineLaurel236
301-484ComcastLandlineWshngtnzn4
301-485ComcastLandlineWshngtnzn6
301-486Verizon MarylandLandlineWsng236Z13
301-487Verizon MarylandLandlineMyersville
301-488Verizon MarylandLandlineWsng236Z13
301-489Verizon MarylandLandlineWsng236Z13
301-490Verizon MarylandLandlineLaurel236
301-491Uscoc Of CumberlandLandlineHagerstown
301-492Verizon MarylandLandlineWshngtnzn2
301-493Verizon MarylandLandlineWshngtnzn2
301-494Verizon MarylandLandlineWsng238Z15
301-495Verizon MarylandLandlineWshngtnzn3
301-496Verizon MarylandLandlineWshngtnzn2
301-497Verizon MarylandLandlineLaurel236
301-498Verizon MarylandLandlineLaurel236
301-499Verizon MarylandLandlineWshngtnzn5
301-500MCI/VerizonWirelessWshngtnzn2
301-501AT&T MobilityWirelessOakland
301-502Verizon WirelessWirelessWshngtnzn3
301-503AT&T MobilityWirelessWshngtnzn2
301-504Verizon MarylandLandlineWshngtnzn3
301-505Verizon MarylandLandlineWshngtnzn6
301-506Usa Mobility WirelessWirelessWsng236Z13
301-507Verizon MarylandLandlineWsng236Z13
301-508AT&T MobilityWirelessMyersville
301-509Verizon WirelessWirelessWshngtnzn3
301-510Usa Mobility WirelessWirelessWsng236Z13
301-511Multiple Ocn ListingLandlineXxxxxxxxxx
301-512Verizon WirelessWirelessWshngtnzn3
301-513Verizon MarylandLandlineWsng236Z13
301-514Verizon WirelessWirelessFrederick
301-515Verizon MarylandLandlineGaithersbg
301-516Verizon MarylandLandlineWshngtnzn5
301-517Verizon MarylandLandlineWsngtnzn10
301-518Verizon WirelessWirelessWshngtnzn3
301-519Verizon MarylandLandlineGaithersbg
301-520Verizon WirelessWirelessWshngtnzn3
301-521Verizon MarylandLandlineWshngtnzn6
301-522Verizon MarylandLandlineWsngtnzn11
301-523Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-524Omnipoint Communications Cap OperationsLandlineFrederick
301-525Quantum TelecommunicationsLandlineGaithersbg
301-526AT&T MobilityWirelessWshngtnzn3
301-527Verizon MarylandLandlineGaithersbg
301-528Verizon MarylandLandlineGaithersbg
301-529AT&T MobilityWirelessWsngtnzn10
301-530Verizon MarylandLandlineWshngtnzn2
301-531Starpower CommunicationsLandlineWshngtnzn4
301-532Omnipoint Communications Cap OperationsLandlineLaurel238
301-533Verizon MarylandLandlineOakland
301-534Ymax CommunicationsLandlineIndianhead
301-535AT&T MobilityWirelessWaldorf
301-536Metro by T-MobileWirelessLeonardtn
301-537Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-538AT&T MobilityWirelessWshngtnzn2
301-539Teleport Communications AmericaLandlineLa Plata
301-540Verizon MarylandLandlineGaithersbg
301-541Teleport Communications AmericaLandlineWshngtnzn5
301-542Teleport Communications AmericaLandlineWaldorf
301-543Teleport Communications AmericaLandlineLaurel236
301-544Verizon MarylandLandlineWsngtnzn10
301-545Verizon MarylandLandlineWsngtnzn10
301-546Verizon MarylandLandlineWshngtnzn4
301-547Teleport Communications AmericaLandlineWshngtnzn2
301-548Verizon MarylandLandlineWsngtnzn10
301-549Verizon MarylandLandlineAshton236
301-550AT&T MobilityWirelessWsngtnzn10
301-551Baltimore-Washington Telephone (Bwt)LandlineWshngtnzn3
301-552Verizon MarylandLandlineWsng236Z13
301-553Usa Mobility WirelessWirelessWaldorf
301-554Usa Mobility WirelessWirelessWshngtnzn2
301-555Multiple Ocn ListingLandlineDir Asst
301-556Teleport Communications AmericaLandlineGaithersbg
301-557Lumen/Level 3LandlineWshngtnzn3
301-558Omnipoint Communications Cap OperationsLandlineWsng236Z13
301-559Verizon MarylandLandlineWshngtnzn4
301-560Paetec ItelLandlineWshngtnzn4
301-561Baltimore-Washington Telephone (Bwt)LandlineWshngtnzn3
301-562Verizon MarylandLandlineWshngtnzn3
301-563Verizon MarylandLandlineWshngtnzn3
301-564Verizon MarylandLandlineWshngtnzn2
301-565Verizon MarylandLandlineWshngtnzn3
301-566Verizon MarylandLandlineWsng236Z13
301-567Verizon MarylandLandlineWshngtnzn6
301-568Verizon MarylandLandlineWshngtnzn5
301-569Verizon WirelessWirelessGaithersbg
301-570Verizon MarylandLandlineAshton236
301-571Verizon MarylandLandlineWshngtnzn2
301-572Verizon MarylandLandlineWshngtnzn3
301-573Metro by T-MobileWirelessHagerstown
301-574Verizon MarylandLandlineWsng236Z15
301-575Paetec ItelLandlineLaurel236
301-576Paetec ItelLandlineWshngtnzn3
301-577Verizon MarylandLandlineWshngtnzn4
301-578Verizon MarylandLandlineWshngtnzn3
301-579Verizon MarylandLandlineBrandywine
301-580Verizon WirelessWirelessWshngtnzn3
301-581Verizon MarylandLandlineWshngtnzn2
301-582Verizon MarylandLandlineHagerstown
301-583Verizon MarylandLandlineWshngtnzn4
301-584Baltimore-Washington Telephone (Bwt)LandlineWsngtnzn12
301-585Verizon MarylandLandlineWshngtnzn3
301-586Verizon MarylandLandlineWshngtnzn3
301-587Verizon MarylandLandlineWshngtnzn3
301-588Verizon MarylandLandlineWshngtnzn3
301-589Verizon MarylandLandlineWshngtnzn3
301-590Verizon MarylandLandlineWsngtnzn10
301-591Paetec ItelLandlineGaithersbg
301-592Verizon MarylandLandlineWshngtnzn3
301-593Verizon MarylandLandlineWshngtnzn3
301-594Verizon MarylandLandlineWshngtnzn2
301-595Verizon MarylandLandlineWsng236Z13
301-596Verizon MarylandLandlineLaurel238
301-597AT&T MobilityWirelessWaldorf
301-598Verizon MarylandLandlineWsngtnzn12
301-599Verizon MarylandLandlineWshngtnzn5
301-600Verizon MarylandLandlineFrederick
301-601Verizon MarylandLandlineWsngtnzn10
301-602Verizon WirelessWirelessWshngtnzn3
301-603Verizon MarylandLandlineWsngtnzn11
301-604Verizon MarylandLandlineLaurel236
301-605Verizon MarylandLandlineWsngtnzn10
301-606Verizon WirelessWirelessFrederick
301-607Verizon MarylandLandlineDamascs240
301-608Verizon MarylandLandlineWshngtnzn3
301-609Verizon MarylandLandlineWaldorf
301-610Verizon MarylandLandlineWsngtnzn10
301-611Multiple Ocn ListingLandlineXxxxxxxxxx
301-612Teleport Communications AmericaLandlineWsng238Z14
301-613Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-614Verizon MarylandLandlineWsng236Z13
301-615Bandwidth.comLandlineWsng236Z13
301-616Uscoc Of CumberlandLandlineOakland
301-617Verizon MarylandLandlineLaurel236
301-618Verizon MarylandLandlineWshngtnzn4
301-619Verizon MarylandLandlineFrederick
301-620Verizon MarylandLandlineFrederick
301-621Verizon MarylandLandlineWsng238Z14
301-622Verizon MarylandLandlineWshngtnzn3
301-623Teleport Communications AmericaLandlineWsng236Z13
301-624Verizon MarylandLandlineFrederick
301-625Verizon MarylandLandlineWshngtnzn3
301-626Verizon MarylandLandlineWshngtnzn3
301-627Verizon MarylandLandlineWsng236Z15
301-628Teleport Communications AmericaLandlineWshngtnzn3
301-629Verizon MarylandLandlineWsng238Z14
301-630Verizon MarylandLandlineWshngtnzn6
301-631Verizon MarylandLandlineFrederick
301-632Verizon MarylandLandlineWaldorf
301-633AT&T MobilityWirelessWshngtnzn2
301-634Teleport Communications AmericaLandlineWshngtnzn2
301-635Bandwidth.comLandlineWshngtnzn5
301-636Verizon MarylandLandlineWshngtnzn5
301-637Lumen/Level 3LandlineWsngtnzn10
301-638Verizon MarylandLandlineWaldorf
301-639Verizon WirelessWirelessFrederick
301-640Verizon MarylandLandlineWsngtnzn10
301-641Verizon WirelessWirelessWshngtnzn3
301-642AT&T MobilityWirelessWshngtnzn2
301-643Verizon WirelessWirelessWaldorf
301-644Verizon MarylandLandlineFrederick
301-645Verizon MarylandLandlineWaldorf
301-646AT&T MobilityWirelessWshngtnzn2
301-647American Messaging ServicesLandlineWsng236Z13
301-648AT&T MobilityWirelessWshngtnzn2
301-649Verizon MarylandLandlineWsngtnzn11
301-650Verizon MarylandLandlineWshngtnzn3
301-651Verizon WirelessWirelessWshngtnzn3
301-652Verizon MarylandLandlineWshngtnzn2
301-653AT&T MobilityWirelessWaldorf
301-654Verizon MarylandLandlineWshngtnzn2
301-655AT&T MobilityWirelessWshngtnzn2
301-656Verizon MarylandLandlineWshngtnzn2
301-657Verizon MarylandLandlineWshngtnzn2
301-658Teleport Communications AmericaLandlineAshton236
301-659AT&T MobilityWirelessWaldorf
301-660AT&T MobilityWirelessKeedysvl
301-661AT&T MobilityWirelessWshngtnzn2
301-662Verizon MarylandLandlineFrederick
301-663Verizon MarylandLandlineFrederick
301-664Verizon MarylandLandlineWshngtnzn2
301-665Verizon MarylandLandlineHagerstown
301-666Teleport Communications AmericaLandlineWsng236Z14
301-667AT&T MobilityWirelessMyersville
301-668Verizon MarylandLandlineFrederick
301-669Verizon MarylandLandlineWshngtnzn5
301-670Verizon MarylandLandlineWsngtnzn10
301-671Bandwidth.comLandlineHagerstown
301-672Omnipoint Communications Cap OperationsLandlineLxtnpkgrml
301-673AT&T MobilityWirelessFrederick
301-674Omnipoint Communications Cap OperationsLandlineWshngtnzn2
301-675Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-676AT&T MobilityWirelessFrederick
301-677Teleport Communications AmericaLandlineWsng236Z14
301-678Verizon MarylandLandlineHancock
301-679Teleport Communications AmericaLandlineWsngtnzn12
301-680Verizon MarylandLandlineWshngtnzn3
301-681Verizon MarylandLandlineWshngtnzn3
301-682Verizon MarylandLandlineFrederick
301-683Teleport Communications AmericaLandlineWshngtnzn4
301-684Teleport Communications AmericaLandlineIndianhead
301-685Teleport Communications AmericaLandlineDamascs236
301-686Verizon MarylandLandlineWshngtnzn6
301-687Verizon MarylandLandlineFrostburg
301-688Verizon MarylandLandlineWsng236Z13
301-689Verizon MarylandLandlineFrostburg
301-690Idt AmericaLandlineLeonardtn
301-691Teleport Communications AmericaLandlinePoolesvl
301-692Teleport Communications AmericaLandlineWsngtnzn11
301-693Omnipoint Communications Cap OperationsLandlineFrederick
301-694Verizon MarylandLandlineFrederick
301-695Verizon MarylandLandlineFrederick
301-696Verizon MarylandLandlineFrederick
301-697AT&T MobilityWirelessCumberland
301-698Verizon MarylandLandlineFrederick
301-699Verizon MarylandLandlineWshngtnzn4
301-700Landline
301-701Bandwidth.comLandlineWsng236Z13
301-702Verizon MarylandLandlineWshngtnzn5
301-703Lumen/Level 3LandlineMount Airy
301-704Verizon WirelessWirelessWshngtnzn3
301-705Verizon MarylandLandlineWaldorf
301-706Verizon WirelessWirelessWshngtnzn3
301-707Uscoc Of CumberlandLandlineCumberland
301-708Verizon WirelessWirelessLaurel238
301-709Csc WirelessWirelessCumberland
301-710Lumen/Level 3LandlineWaldorf
301-711Multiple Ocn ListingLandlineXxxxxxxxxx
301-712MCI/VerizonWirelessFrederick
301-713Verizon MarylandLandlineWshngtnzn3
301-714Verizon MarylandLandlineHagerstown
301-715Teleport Communications AmericaLandlineWsng236Z15
301-716Verizon MarylandLandlineWsng236Z13
301-717Verizon WirelessWirelessWshngtnzn3
301-718Verizon MarylandLandlineWshngtnzn2
301-719Teleport Communications AmericaLandlineWsngtnzn16
301-720Teleport Communications AmericaLandlineBrandywine
301-721Verizon MarylandLandlineWsngtnzn10
301-722Verizon MarylandLandlineCumberland
301-723Verizon MarylandLandlineCumberland
301-724Verizon MarylandLandlineCumberland
301-725Verizon MarylandLandlineLaurel236
301-726MCI/VerizonWirelessKitzmiller
301-727Baltimore-Washington Telephone (Bwt)LandlineWshngtnzn5
301-728Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-729Verizon MarylandLandlineCumberland
301-730AT&T MobilityWirelessMyersville
301-731Verizon MarylandLandlineWshngtnzn4
301-732Metro by T-MobileWirelessFrederick
301-733Verizon MarylandLandlineHagerstown
301-734Verizon MarylandLandlineWshngtnzn3
301-735Verizon MarylandLandlineWshngtnzn5
301-736Verizon MarylandLandlineWshngtnzn5
301-737Verizon MarylandLandlineLxtnpkgrml
301-738Verizon MarylandLandlineWsngtnzn10
301-739Verizon MarylandLandlineHagerstown
301-740Verizon MarylandLandlineGaithersbg
301-741Lumen/Level 3LandlineLaurel236
301-742AT&T MobilityWirelessWshngtnzn2
301-743Verizon MarylandLandlineIndianhead
301-744Verizon MarylandLandlineIndianhead
301-745Verizon MarylandLandlineHagerstown
301-746Verizon MarylandLandlineFriendsvl
301-747Teleport Communications AmericaLandlineWshngtnzn6
301-748Metro by T-MobileWirelessFrederick
301-749Verizon MarylandLandlineWshngtnzn6
301-750Core CommunicationsLandlineFriendsvl
301-751Verizon WirelessWirelessWaldorf
301-752Verizon WirelessWirelessWaldorf
301-753Verizon MarylandLandlineWshngtnzn6
301-754Verizon MarylandLandlineWshngtnzn3
301-755MCI/VerizonWirelessWshngtnzn3
301-756Lumen/Level 3LandlineWsng236Z14
301-757Verizon MarylandLandlineLxtnpkgrml
301-758Verizon WirelessWirelessWshngtnzn3
301-759Verizon MarylandLandlineCumberland
301-760Lumen/Level 3LandlineWshngtnzn2
301-761Lumen/Level 3LandlineWsngtnzn11
301-762Verizon MarylandLandlineWsngtnzn10
301-763Verizon MarylandLandlineWshngtnzn5
301-764Verizon MarylandLandlineWaldorf
301-765Verizon MarylandLandlineWsngtnzn10
301-766Verizon MarylandLandlineHagerstown
301-767Verizon MarylandLandlineWshngtnzn2
301-768Lumen/Level 3LandlineWshngtnzn3
301-769Verizon MarylandLandlineLeonardtn
301-770Verizon MarylandLandlineWsngtnzn11
301-771Verizon MarylandLandlineWshngtnzn2
301-772Verizon MarylandLandlineWshngtnzn4
301-773Verizon MarylandLandlineWshngtnzn4
301-774Verizon MarylandLandlineAshton236
301-775Verizon WirelessWirelessWshngtnzn3
301-776Verizon MarylandLandlineLaurel236
301-777Verizon MarylandLandlineCumberland
301-778MCI/VerizonWirelessWshngtnzn5
301-779Verizon MarylandLandlineWshngtnzn4
301-780Verizon MarylandLandlineWsng236Z15
301-781SpectrumLandlineWshngtnzn4
301-782Verizon MarylandLandlineBrandywine
301-783Bandwidth.comLandlineCumberland
301-784Verizon MarylandLandlineCumberland
301-785Verizon WirelessWirelessWshngtnzn3
301-786Verizon MarylandLandlineMccoole
301-787Verizon WirelessWirelessWshngtnzn3
301-788Verizon WirelessWirelessFrederick
301-789Core CommunicationsLandlineWshngtnzn4
301-790Verizon MarylandLandlineHagerstown
301-791Verizon MarylandLandlineHagerstown
301-792Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-793Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-794Verizon MarylandLandlineWsng236Z14
301-795MCI/VerizonWirelessWsngtnzn10
301-796Verizon MarylandLandlineWsng236Z13
301-797Verizon MarylandLandlineHagerstown
301-798Verizon MarylandLandlineDamascs240
301-799Core CommunicationsLandlineKeedysvl
301-800Omnipoint Communications Cap OperationsLandlineHagerstown
301-801Verizon WirelessWirelessWshngtnzn3
301-802Verizon WirelessWirelessWshngtnzn3
301-803Verizon MarylandLandlineWshngtnzn2
301-804MCI/VerizonWirelessAshton236
301-805Verizon MarylandLandlineWsng236Z14
301-806Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-807Verizon WirelessWirelessWshngtnzn3
301-808Verizon MarylandLandlineWshngtnzn5
301-809Verizon MarylandLandlineWsng236Z14
301-810SpectrumLandlineBuckeystn
301-811Multiple Ocn ListingLandlineXxxxxxxxxx
301-812Verizon MarylandLandlineWsng238Z15
301-813Baltimore-Washington Telephone (Bwt)LandlineWshngtnzn2
301-814AT&T MobilityWirelessWshngtnzn2
301-815Verizon MarylandLandlineFrederick
301-816Verizon MarylandLandlineWsngtnzn11
301-817Verizon MarylandLandlineWshngtnzn5
301-818Bandwidth.comLandlineWaldorf
301-819Verizon MarylandLandlineWshngtnzn3
301-820Teleport Communications AmericaLandlineGaithersbg
301-821Teleport Communications AmericaLandlineLaurel236
301-822MCI/VerizonWirelessWsngtnzn11
301-823Teleport Communications AmericaLandlineWsng236Z13
301-824Verizon MarylandLandlineSmithsburg
301-825AT&TLandlineWsngtnzn10
301-826Verizon MarylandLandlineLxtnpkgrml
301-827Verizon MarylandLandlineWshngtnzn2
301-828Teleport Communications AmericaLandlineWshngtnzn2
301-829Verizon MarylandLandlineMount Airy
301-830Teleport Communications AmericaLandlineWshngtnzn3
301-831Verizon MarylandLandlineDamascs240
301-832Teleport Communications AmericaLandlineWshngtnzn4
301-833Teleport Communications AmericaLandlineWsng236Z14
301-834Verizon MarylandLandlineBrunswick
301-835VonageLandlineFrederick
301-836Verizon MarylandLandlineWshngtnzn5
301-837MCI/VerizonWirelessWsng236Z13
301-838Verizon MarylandLandlineWsngtnzn10
301-839Verizon MarylandLandlineWshngtnzn6
301-840Verizon MarylandLandlineWsngtnzn10
301-841MCI/VerizonWirelessWshngtnzn2
301-842Verizon MarylandLandlineClear Spg
301-843Verizon MarylandLandlineWshngtnzn6
301-844Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-845Verizon MarylandLandlineWalkersvl
301-846Verizon MarylandLandlineFrederick
301-847Verizon MarylandLandlineWsngtnzn12
301-848Verizon WirelessWirelessWaldorf
301-849Bandwidth.comLandlineOakland
301-850Lumen/Level 3LandlineWsng236Z14
301-851Verizon MarylandLandlineWshngtnzn4
301-852Verizon MarylandLandlineWshngtnzn4
301-853Verizon MarylandLandlineWshngtnzn4
301-854Verizon MarylandLandlineAshton238
301-855Verizon MarylandLandlineWsng238Z15
301-856Verizon MarylandLandlineWsngtnzn16
301-857Core CommunicationsLandlineClear Spg
301-858Verizon MarylandLandlineWsng238Z14
301-859Lumen/Level 3LandlineOakland
301-860Verizon MarylandLandlineWsng236Z14
301-861Lumen/Level 3LandlineWaldorf
301-862Verizon MarylandLandlineLxtnpkgrml
301-863Verizon MarylandLandlineLxtnpkgrml
301-864Verizon MarylandLandlineWshngtnzn4
301-865Verizon MarylandLandlineNew Market
301-866Verizon MarylandLandlineLxtnpkgrml
301-867MCI/VerizonWirelessWsng236Z14
301-868Verizon MarylandLandlineWsngtnzn16
301-869Verizon MarylandLandlineGaithersbg
301-870Verizon MarylandLandlineWshngtnzn6
301-871Verizon MarylandLandlineWsngtnzn11
301-872Verizon MarylandLandlineRidge
301-873Verizon WirelessWirelessWshngtnzn3
301-874Verizon MarylandLandlineBuckeystn
301-875Verizon WirelessWirelessLaurel236
301-876Lumen/Level 3LandlineCumberland
301-877Verizon MarylandLandlineWsngtnzn16
301-878MCI/VerizonWirelessBaltimore
301-879Verizon MarylandLandlineWsngtnzn12
301-880Lumen/Level 3LandlineLxtnpkgrml
301-881Verizon MarylandLandlineWsngtnzn11
301-882Core CommunicationsLandlineNew Market
301-883Verizon MarylandLandlineWshngtnzn5
301-884Verizon MarylandLandlineMechancsvl
301-885Verizon MarylandLandlineWaldorf
301-886Bandwidth.comLandlineWsng236Z13
301-887Verizon MarylandLandlineWshngtnzn4
301-888Verizon MarylandLandlineWsngtnzn16
301-889Verizon MarylandLandlineWsng238Z14
301-890Verizon MarylandLandlineWsngtnzn12
301-891Verizon MarylandLandlineWshngtnzn3
301-892Verizon MarylandLandlineWshngtnzn4
301-893Verizon MarylandLandlineWshngtnzn6
301-894Verizon MarylandLandlineWshngtnzn6
301-895Verizon MarylandLandlineGrantsvl
301-896Verizon MarylandLandlineWshngtnzn2
301-897Verizon MarylandLandlineWshngtnzn2
301-898Verizon MarylandLandlineFrederick
301-899Verizon MarylandLandlineWshngtnzn5
301-900OnvoyLandlineWshngtnzn2
301-901Verizon MarylandLandlineWsng236Z13
301-902Verizon MarylandLandlineWsng236Z13
301-903Verizon MarylandLandlineWsngtnzn10
301-904Verizon WirelessWirelessLeonardtn
301-905Verizon MarylandLandlineWshngtnzn3
301-906AT&T MobilityWirelessWshngtnzn2
301-907Verizon MarylandLandlineWshngtnzn2
301-908Verizon WirelessWirelessWshngtnzn3
301-909MCI/VerizonWirelessWshngtnzn5
301-910AT&T MobilityWirelessWshngtnzn2
301-911Multiple Ocn ListingLandlineXxxxxxxxxx
301-912Verizon MarylandLandlineWsng238Z14
301-913Verizon MarylandLandlineWshngtnzn2
301-914Mountain CommunicationsLandlineOakland
301-915Starpower CommunicationsLandlineWshngtnzn2
301-916Verizon MarylandLandlineGaithersbg
301-917Starpower CommunicationsLandlineWsngtnzn10
301-918Verizon MarylandLandlineWshngtnzn4
301-919AT&T MobilityWirelessWshngtnzn2
301-920Starpower CommunicationsLandlineWshngtnzn3
301-921Verizon MarylandLandlineWsngtnzn10
301-922Verizon WirelessWirelessWshngtnzn3
301-923Bandwidth.comLandlineWsng236Z13
301-924Verizon MarylandLandlineWsngtnzn12
301-925Verizon MarylandLandlineWshngtnzn5
301-926Verizon MarylandLandlineGaithersbg
301-927Verizon MarylandLandlineWshngtnzn4
301-928Verizon WirelessWirelessWshngtnzn3
301-929Verizon MarylandLandlineWsngtnzn11
301-930Verizon MarylandLandlineWshngtnzn3
301-931Verizon MarylandLandlineWsng236Z13
301-932Verizon MarylandLandlineWaldorf
301-933Verizon MarylandLandlineWsngtnzn11
301-934Verizon MarylandLandlineLa Plata
301-935Verizon MarylandLandlineWsng236Z13
301-936TelnyxLandlineHagerstown
301-937Verizon MarylandLandlineWsng236Z13
301-938Verizon WirelessWirelessWshngtnzn3
301-939Verizon MarylandLandlineWsng236Z13
301-940Verizon MarylandLandlineWshngtnzn5
301-941Verizon MarylandLandlineWshngtnzn2
301-942Verizon MarylandLandlineWsngtnzn11
301-943Verizon WirelessWirelessWshngtnzn3
301-944MCI/VerizonWirelessGaithersbg
301-945MCI/VerizonWirelessWsngtnzn11
301-946Verizon MarylandLandlineWsngtnzn11
301-947Verizon MarylandLandlineGaithersbg
301-948Verizon MarylandLandlineWsngtnzn10
301-949Verizon MarylandLandlineWsngtnzn11
301-950Landline
301-951Verizon MarylandLandlineWshngtnzn2
301-952Verizon MarylandLandlineWsng236Z15
301-953Verizon MarylandLandlineWsng236Z13
301-954Verizon MarylandLandlineWshngtnzn4
301-955MCI/VerizonWirelessWshngtnzn4
301-956Verizon MarylandLandlineGaithersbg
301-957MCI/VerizonWirelessLaurel236
301-958Landline
301-959Landline
301-960MCI/VerizonWirelessWshngtnzn3
301-961Verizon MarylandLandlineWshngtnzn2
301-962Verizon MarylandLandlineWsngtnzn11
301-963Verizon MarylandLandlineGaithersbg
301-964AT&T MobilityWirelessMyersville
301-965MCI/VerizonWirelessWshngtnzn6
301-966MCI/VerizonWirelessWsngtnzn12
301-967Verizon MarylandLandlineWshngtnzn5
301-968MCI/VerizonWirelessWshngtnzn2
301-969ComcastLandlineBrunswick
301-970Verizon MarylandLandlineWsng238Z14
301-971Starpower CommunicationsLandlineWshngtnzn6
301-972Verizon MarylandLandlineGaithersbg
301-973Bandwidth.comLandlineWsng238Z14
301-974Starpower CommunicationsLandlineLaurel236
301-975Verizon MarylandLandlineWsngtnzn10
301-976Multiple Ocn ListingLandlineXxxxxxxxxx
301-977Verizon MarylandLandlineGaithersbg
301-978Verizon MarylandLandlineWsngtnzn10
301-979Omnipoint Communications Cap OperationsLandlineWsngtnzn10
301-980Verizon WirelessWirelessWshngtnzn3
301-981Lumen/Level 3LandlineWshngtnzn5
301-982Verizon MarylandLandlineWsng236Z13
301-983Verizon MarylandLandlineWsngtnzn10
301-984Verizon MarylandLandlineWsngtnzn11
301-985Verizon MarylandLandlineWshngtnzn4
301-986Verizon MarylandLandlineWshngtnzn2
301-987Verizon MarylandLandlineGaithersbg
301-988Uscoc Of CumberlandLandlineHagerstown
301-989Verizon MarylandLandlineWsngtnzn12
301-990Verizon MarylandLandlineGaithersbg
301-991Omnipoint Communications Cap OperationsLandlineHagerstown
301-992Metro by T-MobileWirelessHagerstown
301-993Verizon MarylandLandlineWsng236Z13
301-994Verizon MarylandLandlineLxtnpkgrml
301-995Verizon MarylandLandlineLxtnpkgrml
301-996Omnipoint Communications Cap OperationsLandlineWshngtnzn3
301-997Verizon MarylandLandlineLeonardtn
301-998Verizon MarylandLandlineWsngtnzn11
301-999Verizon MarylandLandlineHagerstown
Overlay Area Codes
240

All 6 area codes in Maryland

301227240410443667

About Area Code 301

Back in 1947, when phone systems were just getting their feet under them, area code 301 popped up as one of the originals, covering a big chunk of Maryland that stretched from the busy streets of Silver Spring all the way out to quieter spots like Hagerstown. Imagine that: it was a time when folks were still dialing operators for long-distance chats, and suddenly, 301 became the go-to for connecting people in this slice of the East Coast. This code wraps around places like Bethesda, where you might spot high-tech labs buzzing with research, or Frederick, with its mix of historic battlefields and modern suburbs. It's served 11 cities in total, painting a picture of Maryland's varied vibe—from the college crowds in College Park to the family-oriented vibes in Gaithersburg. Over the years, 301 got an overlay buddy in 240, which helps handle the growing number of calls as more folks moved in. What makes 301 stand out? It's all about that blend of urban energy and rural charm, like driving from the shopping hubs in Bowie to the mountains near Cumberland. If you're chatting with someone in 301, you're probably talking to a local who's seen the area's evolution firsthand, from postwar growth to today's tech-savvy communities. It's not just a code; it's a thread in Maryland's everyday story, linking neighbors across bridges and byways.

⚠ Scam & Spam Alert for 301

If you live in the 301 area, you might get calls that sound official but are anything but. IRS scams are pretty common around here, with scammers pretending to be agents demanding immediate payment for bogus taxes. Then there's the auto warranty racket, where they'll claim your car's coverage is about to expire and push you to buy extended plans over the phone. Medicare fraud hits a lot too, especially in places like Bethesda with older residents, as crooks offer fake services or ask for personal info. Don't fall for it; these calls often use pressure tactics to rush you. A simple tip: always hang up and call back the organization directly using a number from their official website, not the one they give you. That way, you can check if it's legit without handing over any details.

Local Snapshot

Maryland's population around Silver Spring tops out at about 6 million statewide, with the metro area buzzing with folks from all walks of life. Tech and biotech drive the economy here, thanks to companies near Gaithersburg that keep innovation rolling. The region is famous for its food scene, pulling in crowds for everything from crab cakes in Baltimore to international eats in diverse neighborhoods. Here's a quirky fact: Maryland has more millionaires per capita than most states, partly because of all those federal jobs in the D.C. suburbs.

Frequently Asked Questions

Where is area code 301?
Area code 301 serves Silver Spring and surrounding communities in Maryland, including Bethesda, Bowie, College Park, Cumberland, Frederick and 6 more. It is in the Eastern time zone.
What cities are in area code 301?
Area code 301 covers 11 cities in Maryland: Bethesda, Bowie, College Park, Cumberland, Frederick, Gaithersburg, Germantown, Hagerstown, Laurel, Rockville, and 1 more
What time zone is 301?
Area code 301 is in the Eastern time zone (UTC-5).
When was area code 301 created?
Area code 301 is one of the original area codes established in 1947 as part of the North American Numbering Plan.
Is 301 a legitimate area code?
Yes, 301 is a valid, active area code assigned to Silver Spring, Maryland. However, scammers can spoof any area code, so receiving a call from 301 doesn't guarantee the caller is actually in this area.
What area codes overlap with 301?
Area code 301 shares its geographic area with overlay code 240. This means all local calls in the area require 10-digit dialing.

What major government institutions are located in the 301 area code?

The National Institutes of Health is in Bethesda, which is part of the 301 area code, and it focuses on medical research. The U.S. Food and Drug Administration is also headquartered in this area, contributing to public health efforts. Fort Detrick in Frederick serves as a key military and biomedical research site.

How does area code 301 connect to the University of Maryland?

Area code 301 covers College Park, home to the University of Maryland, a major public research university. This university has a strong focus on programs in engineering and agriculture, drawing students from across the region. The area code has facilitated communication for the university's community since 1947.

Has area code 301 been involved in any overlays or splits?

Area code 301, established in 1947, was later overlaid with 240 in 1997 to handle increasing demand for phone numbers. This overlay affects the same geographic area, including cities like Gaithersburg and Germantown. The change helped accommodate growth in the Washington D.C. suburbs without disrupting existing services.

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