Lockhart, TX — rate center
- State
- Texas
- Active prefixes
- 17
- Carriers
- 11
- Pooled prefixes
- 16
- LATA
- 558
- Metro area
- Austin-Round Rock-San Marcos, TX MSA
The Lockhart rate center (Texas) anchors 17 active prefixes under area codes 512, 737. Rate centers, not city limits, are what phone numbers are legally tied to.
The rate center currently carries 17 working prefixes across 11 carriers. 16 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 Lockhart 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 Lockhart
| Prefix | Code holder | Pooled |
|---|---|---|
| 512-213 | LEVEL 3 COMMUNICATIONS, LLC - TX | Yes |
| 512-227 | SOUTHWESTERN BELL | Yes |
| 512-359 | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | Yes |
| 512-376 | SOUTHWESTERN BELL | Yes |
| 512-398 | SOUTHWESTERN BELL | No |
| 512-620 | SOUTHWESTERN BELL | Yes |
| 512-668 | TWC IP ENABLED SERVICES, LLC | Yes |
| 512-729 | ONVOY, LLC - TX | Yes |
| 512-855 | AT&T - LOCAL | Yes |
| 512-885 | ONVOY, LLC - TX | Yes |
| 512-995 | NEW CINGULAR WIRELESS PCS, LLC - IL | Yes |
FAQ
What area code is Lockhart, TX?
Lockhart is served by 2 area codes — 512, 737 — which overlay the same territory.
How many prefixes does Lockhart have?
17 active NXX prefixes are anchored to this rate center in NANPA records, held by 11 carriers.
Is a call from a Lockhart prefix really from Lockhart?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.