Prefix 512-737 — Austin, TX
The 512-737 prefix belongs to area code 512 and is anchored to the Austin rate center (TX). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.
Austin 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.
The assigned code holder is ONVOY, LLC - TX, operating company number 903C, assigned August 23, 2023. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
Caller ID showing 512-737 is not proof the call came from Austin: 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
| Prefix | Rate center | Code holder |
|---|---|---|
| 512-734 | Lampasas | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX |
| 512-735 | Austin | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS |
| 512-736 | Austin | T-MOBILE USA, INC. |
| 512-738 | San Marcos | T-MOBILE USA, INC. |
| 512-739 | Austin | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 512-740 | Austin | T-MOBILE USA, INC. |
FAQ
Where is 512-737 located?
The prefix is assigned to the Austin rate center in TX, area code 512. It is part of the Austin-Round Rock-San Marcos, TX Metropolitan Statistical Area.
Which company owns 512-737 numbers?
ONVOY, LLC - TX 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 512-737 safe to answer?
The prefix itself says nothing about the caller. Legitimate Austin businesses and spoofed robocalls can both display it. Never share personal data with an unverified inbound caller.