San Marcos, Texas
Central Time Zone (UTC-6) · TX · —
512
⬡ 1947
Austin
Texas
Central
+1
830
1997
New Braunfels
Texas
Central
Split
737
2013
Austin
Texas
Central
Overlay
About Area Codes in San Marcos, Texas
San Marcos, Texas is served by 3 area codes: 512, 830, 737. When multiple area codes serve the same geographic area, it typically indicates overlay codes have been added to accommodate growing demand for phone numbers. All local calls within San Marcos require 10-digit dialing. The city is in the Central time zone (UTC-6).
Other cities in area code 512
Frequently Asked Questions
What area code is San Marcos, Texas?
San Marcos, Texas uses area codes 512 and 830 and 737.
What time zone is San Marcos in?
San Marcos is in the Central time zone (UTC-6).
Do I need to dial 10 digits when calling San Marcos?
Yes, all local calls in San Marcos require 10-digit dialing because the area is served by multiple overlay area codes.
When was area code 512 created?
Area code 512 is one of the original 86 area codes established in 1947 as part of the North American Numbering Plan (NANP).
What cities share area code 512 with San Marcos?
Other cities sharing area code 512 with San Marcos include Austin, Buda, Cedar Park, Georgetown, Hutto, among others.
San Marcos, TX · Central Time Zone