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210 Area Code

Area code 210 serves San Antonio, Kirby, Alamo Heights, Lackland AFB, Windcrest and nearby communities in Texas. It has been in service since November 1, 1992, when it was split from 512.

StateTexas
Time zoneCentral
Local time now…
Prefixes in use784
Overlay with726
Projected to run out2072
San AntonioKirbyAlamo HeightsLackland AFBWindcrestTerrell HillsSan AntonioLackland AFB
Cities and towns served by area code 210

Who issues 210 numbers

Mobile 36%VoIP and cable 19%Landline 45%

Share of the 784 prefixes (the three digits after 210) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
AT&T (Southwestern Bell)280
AT&T Mobility129
T-Mobile94
Verizon Wireless54
Verizon Business (MCImetro)39
Onvoy (Sinch)39
Lumen (Level 3)37
Bandwidth18

Cities and towns in area code 210

CityPopulationOther area codes
San Antonio1,548,422726
Kirby8,211726
Alamo Heights7,632726
Lackland AFB6,650726
Windcrest5,809726
Terrell Hills5,215726

Got a call from 210?

A 210 number was originally issued in Texas, but that does not prove the caller is there. 19% of 210 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 784 prefixes in area code 210

Format: (210) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 210

Where is area code 210?
Area code 210 is in Texas. It covers San Antonio, Kirby, Alamo Heights, Lackland AFB, Windcrest and Terrell Hills.
What time zone is area code 210?
Area code 210 is in the Central time zone.
Is 210 a toll-free number?
No. 210 is a geographic area code in Texas. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Why does 210 share its area with 726?
210 and 726 form an overlay: they cover the same territory, so new numbers there can get any of these codes, and local calls need all 10 digits.
Will area code 210 run out of numbers?
NANPA's latest forecast projects the 210/726 overlay to exhaust in the first quarter of 2072. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Texas