Prefix 210-505 — San Antonio, TX

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

Area code
210
Prefix (NXX)
505
Rate center
San Antonio
State
Texas
Time zone
Central
Code holder
NEW CINGULAR WIRELESS PCS, LLC - IL
OCN
6534
Pooled
Yes (thousands-block pooling)
Assigned
2010-06-15
LATA
566

The 210-505 prefix belongs to area code 210 and is anchored to the San Antonio rate center (TX). In NANP terms, the prefix — or NXX — determines the rate center a number is billed against.

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.

Code-holder of record: NEW CINGULAR WIRELESS PCS, LLC - IL (OCN 6534), assigned June 15, 2010. The prefix is pooled: its ten thousands-blocks can be shared among several carriers, so different 210-505 numbers may be served by different companies.

Caller ID showing 210-505 is not proof the call came from San Antonio: 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

Prefixes adjacent to 210-505
PrefixRate centerCode holder
210-502 San Antonio NEW CINGULAR WIRELESS PCS, LLC - IL
210-503 San Antonio AT&T ENTERPRISES, LLC
210-504 San Antonio LEVEL 3 COMMUNICATIONS, LLC - TX
210-506 San Antonio SOUTHWESTERN BELL
210-507 San Antonio TELEPORT COMMUNICATIONS AMERICA, LLC - TX
210-508 San Antonio NEW CINGULAR WIRELESS PCS, LLC - IL

FAQ

Where is 210-505 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 210-505 numbers?

NEW CINGULAR WIRELESS PCS, LLC - IL 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 210-505 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.