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US area code · Texas

210 area code

Where the 210 area code is, its overlay and how to dial a +1 210 number from anywhere.

CoversSan Antonio, TexasTime zoneCentral (CT)TypeOverlay
Quick answer

The 210 area code is in San Antonio, Texas, United States (Central (CT)). To call from abroad: +1 210 555-0123. It is an overlay, so all 10 digits are dialled.

StateTexas
Main areaSan Antonio
Time zoneCentral (CT)
TypeOverlay
10-digit dialingRequired
In service since01-Nov-1992

The 210 area code is a geographic North American Numbering Plan (NANP) code covering San Antonio, Texas. It has been in service since 01-Nov-1992 and sits in the Central (CT) time zone.

Overlay 210 shares its region

Several area codes cover the same geographic area, so two neighbours can have different codes. Because of the overlay, you must dial all 10 digits (area code + number) even for local calls.

210512726

How to dial a 210 number

From abroad+1 210 555-0123
Within the US / Canada1 210 555-0123
Locally (same area)210 555-0123

Cities in the 210 area code

A 210 number is usually in one of these places in Texas — 1 county.

San Antonio Bexar;Comal

Other Texas area codes

214254281325346361409430432469512621682713726737

Frequently asked questions

Where is the 210 area code?

The 210 area code is in San Antonio, Texas, United States (Central (CT)).

Is 210 an overlay area code?

Yes. 210 overlays the same region as 512, 726, so callers dial all 10 digits.

Do I have to dial 10 digits for 210?

Yes — dial the area code plus the seven-digit number.

How do I call a 210 number from another country?

Dial your exit code (or +), then 1, then 210, then the number: +1 210 555-0123.

Source: NANPA numbering plan. An area code covers a region, not a precise address — a 210 number does not pinpoint a street or ZIP code.

Number holders in area code 210

Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 800 prefixes are in use in 210, shared by 38 companies. The largest holders:

CompanyPrefixesShare
Southwestern Bell28135%
New Cingular Wireless PCS, LLC12916%
T-Mobile USA, Inc.9412%
Cellco Partnership Dba Verizon Wireless547%
Mcimetro Access Transmission Services LLC395%
Onvoy, LLC375%

Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.

Complaints about 210 numbers

Reports to the FTC, last 30 days
779
Recorded messages or robocalls
66%
Rank among area codes
#83 of 670
Most reported subjects
Other (353)
Calls pretending to be government, businesses, or family and friends (121)
Medical & prescriptions (104)

Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.

Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).

All US area codes United States +1 Map of area code 210 — cities & rate centres

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