Prefix 512-621 — Austin, TX
A phone number starting 512-621 was issued in the Austin rate center of TX — part of area code 512.
The assigned code holder is CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX, operating company number 6506, assigned May 31, 2013. This is a pooled prefix — expect numbers within it to be split across more than one carrier in 1,000-number blocks.
A scammer can display 512-621 without ever touching TX. When in doubt, end the call and reach the company or agency through its official website; unwanted robocalls belong in the FTC's fraud report queue.
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.
Neighboring prefixes
| Prefix | Rate center | Code holder |
|---|---|---|
| 512-618 | San Marcos | NEW CINGULAR WIRELESS PCS, LLC - IL |
| 512-619 | Austin | T-MOBILE USA, INC. |
| 512-620 | Lockhart | SOUTHWESTERN BELL |
| 512-622 | Austin | SPOK, INC. |
| 512-623 | Austin | SOUTHWESTERN BELL |
| 512-624 | Austin | SPOK, INC. |
FAQ
Where is 512-621 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 512-621 numbers?
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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 512-621 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.