Prefix 512-640 — Austin, TX
Numbers in the 512-640 prefix are registered to the Austin rate center in TX, inside area code 512. The prefix is the second block of a ten-digit US number (512-640-XXXX) and pins the number to a billing locality.
NANPA's central-office code records list LEVEL 3 COMMUNICATIONS, LLC - TX (OCN 6114) as the code holder, assigned July 3, 2014. Because 512-640 participates in thousands-block pooling, individual 1,000-number blocks may belong to other carriers than the code holder.
The rate center lies in the Austin-Round Rock-San Marcos, TX Metropolitan Statistical Area. The serving LATA is 558. Local time follows the Central zone.
Spoofing means this prefix on your screen doesn't guarantee a Austin caller. Verify independently before trusting a request for money or data.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 512-637 | Austin | AUSTIN BESTLINE COMPANY |
| 512-638 | Austin | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX |
| 512-639 | Georgetown | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX |
| 512-641 | Adamsville | CENTURYLINK COMMUNICATIONS, LLC |
| 512-642 | Hutto | GRANDE COMMUNICATIONS NETWORKS, INC. - TX |
| 512-643 | Austin | BANDWIDTH.COM CLEC, LLC - TX |
FAQ
Where is 512-640 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 512-640 numbers?
LEVEL 3 COMMUNICATIONS, 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 512-640 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.