Prefix 512-214 — San Marcos, TX

NANPA CO code assignment, current as of July 28, 2026.

Area code
512
Prefix (NXX)
214
Rate center
San Marcos
State
Texas
Time zone
Central
Code holder
T-MOBILE USA, INC.
OCN
6529
Pooled
Yes (thousands-block pooling)
Assigned
2014-10-20
LATA
558

The 512-214 prefix belongs to area code 512 and is anchored to the San Marcos rate center (TX). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

San Marcos is part of the Austin-Round Rock-San Marcos, TX Metropolitan Statistical Area. For routing purposes it sits in LATA 558. Numbers here keep Central time.

Code-holder of record: T-MOBILE USA, INC. (OCN 6529), assigned October 20, 2014. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 512-214 numbers may be served by different companies.

Caller ID showing 512-214 is not proof the call came from San Marcos: spoofing and porting both detach numbers from their origin. To verify a caller, hang up and dial the organization's published number, and report suspicious calls to the FTC.

Neighboring prefixes

Prefixes adjacent to 512-214
PrefixRate centerCode holder
512-210 San Marcos CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX
512-212 Martindale NEW CINGULAR WIRELESS PCS, LLC - IL
512-213 Lockhart LEVEL 3 COMMUNICATIONS, LLC - TX
512-215 Austin TWC IP ENABLED SERVICES, LLC
512-216 San Marcos NEW CINGULAR WIRELESS PCS, LLC - IL
512-217 Austin NEW CINGULAR WIRELESS PCS, LLC - IL

FAQ

Where is 512-214 located?

The prefix is assigned to the San Marcos rate center in TX, area code 512. It is part of the Austin-Round Rock-San Marcos, TX Metropolitan Statistical Area.

Which company owns 512-214 numbers?

T-MOBILE USA, INC. holds the code, but the prefix is pooled — individual thousands-blocks can be assigned to other carriers, and numbers may be ported to any provider.

Is a call from 512-214 safe to answer?

The prefix itself says nothing about the caller. Legitimate San Marcos businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.