Prefix 210-239 — San Antonio, TX

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

Area code
210
Prefix (NXX)
239
Rate center
San Antonio
State
Texas
Time zone
Central
Code holder
FOREMOST TELECOMMUNICATIONS CORPORATION - TX
OCN
319D
Pooled
Yes (thousands-block pooling)
Assigned
2006-11-21
LATA
566

A phone number starting 210-239 was issued in the San Antonio rate center of TX — part of area code 210.

Code-holder of record: FOREMOST TELECOMMUNICATIONS CORPORATION - TX (OCN 319D), assigned November 21, 2006. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 210-239 numbers may be served by different companies.

A scammer can display 210-239 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.

San Antonio is part of the San Antonio-New Braunfels, TX Metropolitan Statistical Area. For routing purposes it sits in LATA 566. Numbers here keep Central time.

Neighboring prefixes

Prefixes adjacent to 210-239
PrefixRate centerCode holder
210-236 San Antonio TELEPORT COMMUNICATIONS AMERICA, LLC - TX
210-237 San Antonio LEVEL 3 OF TELECOM OF TEXAS, LLC - TX
210-238 San Antonio CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX
210-240 San Antonio NEW CINGULAR WIRELESS PCS, LLC - IL
210-241 San Antonio NEW CINGULAR WIRELESS PCS, LLC - IL
210-242 San Antonio SOUTHWESTERN BELL

FAQ

Where is 210-239 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 210-239 numbers?

FOREMOST TELECOMMUNICATIONS CORPORATION - 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 210-239 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.