San Marcos, TX — rate center
- State
- Texas
- Active prefixes
- 39
- Carriers
- 14
- Pooled prefixes
- 31
- LATA
- 558
- Metro area
- Austin-Round Rock-San Marcos, TX MSA
Phone numbers "from San Marcos" are, precisely speaking, numbers whose prefixes are anchored to the San Marcos rate center of Texas, under 512, 737.
The rate center currently carries 39 working prefixes across 14 carriers. 31 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
The rate center belongs to the Austin-Round Rock-San Marcos, TX Metropolitan Statistical Area. Routing-wise it sits in LATA 558.
Multiple area codes over one rate center (512/737) is the overlay pattern: same geography, different first three digits.
A San Marcos prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to San Marcos
| Prefix | Code holder | Pooled |
|---|---|---|
| 512-210 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | Yes |
| 512-214 | T-MOBILE USA, INC. | Yes |
| 512-216 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 512-245 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | No |
| 512-353 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | No |
| 512-392 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | No |
| 512-393 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | Yes |
| 512-395 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | Yes |
| 512-396 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | No |
| 512-408 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | No |
| 512-557 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | No |
| 512-558 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | Yes |
| 512-618 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 512-644 | T-MOBILE USA, INC. | Yes |
| 512-665 | T-MOBILE USA, INC. | No |
| 512-667 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | Yes |
| 512-738 | T-MOBILE USA, INC. | Yes |
| 512-749 | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | Yes |
| 512-753 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | Yes |
| 512-754 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | No |
| 512-757 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
| 512-781 | CENTURYLINK COMMUNICATIONS, LLC | Yes |
| 512-787 | T-MOBILE USA, INC. | Yes |
| 512-805 | BRIGHTSPEED OF SOUTHERN TEXAS, INC. | Yes |
| 512-878 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | Yes |
| 512-938 | GRANDE COMMUNICATIONS NETWORKS, INC. - TX | Yes |
FAQ
What area code is San Marcos, TX?
San Marcos is served by 2 area codes — 512, 737 — which overlay the same territory.
How many prefixes does San Marcos have?
39 active NXX prefixes are anchored to this rate center in NANPA records, held by 14 carriers.
Is a call from a San Marcos prefix really from San Marcos?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.