210 area code — San Antonio, TX geographic
Area code 210 is a geographic code serving San Antonio, Texas in the Central time zone. It has been in service since November 1, 1992. The same territory is also served by its overlay code (210/726 complex). Keep in mind the code identifies where the number was registered; the person calling may be elsewhere.
The code currently holds 783 working prefixes, held by 35 different carriers. Of these, 558 are pooled prefixes shared by multiple carriers. Numbers are anchored to a single rate center.
The code was carved out of 512 (1992). As demand grew it in turn gave rise to 830 (1997), 956 (1997), 726 (2017).
The current NANPA exhaust forecast for the 210/726 complex is 1Q 2072.
Local calls inside 210 are dialed 10D.
Use this page to decode where 210 numbers come from — and remember that spoofing means the screen can lie about everything except your own caution.
Largest localities in 210
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| San Antonio | 783 | 726, 830 |
FAQ
Is 210 a toll-free number?
No. 210 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Why do 726 and 210 cover the same place?
They are overlays: when a code runs low on numbers, a new code is added over the same territory instead of splitting it. The 210/726 complex shares one service area, and local calls are dialed with 10 digits.
Will 210 run out of numbers?
NANPA's current forecast projects exhaust in 1Q 2072 — decades of capacity remain.
Why am I getting spam calls from 210 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 210 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 210 number from?
210 is assigned to San Antonio and surrounding areas of Texas in the Central time zone. The three digits after the area code (the prefix) narrow it down to a rate center.