Prefix 210-450 — San Antonio, TX

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

Area code
210
Prefix (NXX)
450
Rate center
San Antonio
State
Texas
Time zone
Central
Code holder
SOUTHWESTERN BELL
OCN
9533
Pooled
Yes (thousands-block pooling)
Assigned
2006-05-12
LATA
566

Numbers in the 210-450 prefix are registered to the San Antonio rate center in TX, inside area code 210. The prefix is the second block of a ten-digit US number (210-450-XXXX) and pins the number to a billing locality.

Code-holder of record: SOUTHWESTERN BELL (OCN 9533), assigned May 12, 2006. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 210-450 numbers may be served by different companies.

The rate center lies in the San Antonio-New Braunfels, TX Metropolitan Statistical Area. The serving LATA is 566. Local time follows the Central zone.

Spoofing means this prefix on your screen doesn't guarantee a San Antonio caller. Verify independently before trusting a request for money or data.

Neighboring prefixes

Prefixes adjacent to 210-450
PrefixRate centerCode holder
210-447 San Antonio U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
210-448 San Antonio U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS
210-449 San Antonio NEW CINGULAR WIRELESS PCS, LLC - IL
210-451 San Antonio AT&T ENTERPRISES, LLC
210-452 San Antonio NEW CINGULAR WIRELESS PCS, LLC - IL
210-453 San Antonio MCIMETRO ACCESS TRANSMISSION SERVICES LLC

FAQ

Where is 210-450 located?

The prefix is assigned to the San Antonio rate center in TX, area code 210. It is part of the San Antonio-New Braunfels, TX Metropolitan Statistical Area.

Which company owns 210-450 numbers?

SOUTHWESTERN BELL 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 210-450 safe to answer?

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