210 Area CodeSan Antonio, TX
Area code 210 covers San Antonio and nearby communities in Texas, in the Central Time (CT) zone, home to about 1.8 million people across 33 cities. It overlays 726, so the same region uses both and every local call needs all ten digits.
Overview
- Major City
- San Antonio
- State
- Texas (TX)
- Timezone
- Central Time (CT)
- Current Time
- Overlay
- Yes – shares area with 726
Where is area code 210?
Area code 210 serves part of San Antonio, TX and the surrounding areas. It has a single overlay (726) that serves the same area.
Overview of the 210 Area Code
What is the 210 area code?
The 210 area code serves San Antonio, Texas, alongside other established area codes. When you see a 210 number, it indicates a local number within this geographic area.
Why was area code 210 created?
The 210 area code was introduced as an overlay to add numbers in San Antonio once the existing area code 726 began to run out of available prefixes. It added a new supply of numbers without requiring current residents to change their existing digits.
Geographic Coverage of the 210 Area Code
The 210 area code serves San Antonio and surrounding areas in Texas. It operates within the Central Time (CT) time zone. It complements the coverage of area code 726. This area code covers several key cities, including:
- San Antonio
- Schertz
- Cibolo
- Converse
- Universal City
- Live Oak
Got a call from a 210 number? It came from San Antonio, TX. Since 210 overlays with 726, every local call in the region needs all ten digits to land on the right line. Inside 210, San Antonio holds about 85% of the population; the rest is split across 32 smaller cities.
San Antonio Area Codes Overview
San Antonio is served by multiple area codes, reflecting its telecommunications needs. The 210 area code operates alongside 726. Here are the area codes serving this region:
The introduction of the 210 area code helped prevent number exhaustion, ensuring a continuous supply of phone numbers across the geographic area.
What cities does area code 210 cover?
| City | State | Population | % of Area Code | % of City |
|---|---|---|---|---|
| San Antonio | TX | 1,526,656 | 38% | 100% |
| Schertz | TX | 44,428 | 2% | 80% |
| Cibolo | TX | 37,816 | 1% | 93% |
| Converse | TX | 31,400 | 1% | 100% |
| Universal City | TX | 20,267 | 0% | 100% |
| Live Oak | TX | 16,218 | 0% | 100% |
| Selma | TX | 11,900 | 0% | 100% |
| Fair Oaks Ranch | TX | 11,744 | 0% | 26% |
| Leon Valley | TX | 11,424 | 0% | 100% |
| Helotes | TX | 10,223 | 1% | 100% |
* Sources: Population – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). Area code assignments – NANPA CO Code data. See our data methodology.
Has area code 210 been reported for unwanted calls?
Yes – 733 unwanted-call complaints were reported to the FTC for numbers showing a 210 area code (May 29 – Jul 2, 2026).
- 57% robocalls
- ↑ 92% vs prior period
Most-reported subjects
- Other49%356
- Dropped call or no message16%118
- Medical & prescriptions12%87
* Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints. Source: FTC Do Not Call (DNC) Reported Calls Data, retrieved 2026-07-05.
Which prefixes and exchanges belong to area code 210?
78% assigned to a telco
- 62% Landline
- 38% Wireless
- 0% Unknown
| Prefix | Usage | Carrier |
|---|---|---|
| (210)200- | Landline | At&T |
| (210)201- | Landline | Southwestern Bell |
| (210)202- | Wireless | Verizon Wireless |
| (210)203- | Landline | American Messaging Services |
| (210)204- | Wireless | T-Mobile Usa |
| (210)205- | Landline | American Messaging Services |
| (210)206- | Landline | Southwestern Bell |
| (210)207- | Landline | Southwestern Bell |
| (210)208- | Landline | Southwestern Bell |
| (210)209- | Wireless | New Cingular Wireless Pcs |
Frequently Asked Questions about the 210 Area Code
Who called me from a 210 number?
A 210 number is assigned to San Antonio, Texas, so a call may come from there. But caller ID is easy to fake, and scammers often spoof a local 210 code to look nearby, so a 210 number doesn't prove the caller is local. Recently, 733 unwanted-call complaints were reported to the FTC for numbers showing the 210 code (57% flagged as robocalls). If you don't recognize the number, let it go to voicemail; a real caller will leave a message.
Is 210 a scam area code?
No area code is a scam on its own. 210 is a normal, officially assigned code for San Antonio, Texas. Spam callers spoof local codes to raise the odds you answer, so 210 on your caller ID says nothing about who is really calling. Recently, 733 unwanted-call complaints were reported to the FTC for numbers showing the 210 code (57% flagged as robocalls). Judge the call itself, not the area code.
Why do I keep getting calls from the 210 area code?
Repeated calls from different 210 numbers are usually spoofing: a robocaller rotates through 210 numbers so each call looks local and slips past simple blocks. Recently, 733 unwanted-call complaints were reported to the FTC for numbers showing the 210 code (57% flagged as robocalls). Blocking one number rarely helps; voicemail screening, your carrier spam filter, and the Do Not Call Registry work better.
Should I answer an unknown 210 number?
If you aren't expecting a 210 call, let it ring to voicemail. Legitimate callers leave a message, most robocallers hang up when no one picks up, and answering can mark your number as active and bring more calls.
How do I block calls from the 210 area code?
Block a single 210 number from your recent-calls list (iPhone: tap the number, then Block this Caller; Android: tap the number, then Block or report spam). To cut the volume, turn on Silence Unknown Callers on iPhone or spam protection on Android, enable spam filtering from your carrier, and register at DoNotCall.gov. Blocking the entire 210 code also stops legitimate local calls, so use it only as a last resort.
Where is area code 210?
Area code 210 covers San Antonio and the surrounding area in Texas, spanning 33 cities with about 1,800,234 residents. It shares its area with overlay code 726.
Is 210 a real area code?
Yes. 210 is an active code in the North American Numbering Plan, assigned by NANPA and in service for San Antonio, Texas. A real code can still show up on spoofed spam calls, so treat unknown 210 calls with normal caution.
What timezone is the 210 area code in?
The 210 area code is in the Central Time (CT). Because a number can be kept when someone moves or switches to VoIP, a specific 210 caller may not be in that zone.
How do I call a 210 number from abroad?
From outside the US, dial your country's exit code, then 1 (the US country code), then 210 and the seven-digit number. From a mobile phone you can usually just enter +1 210 followed by the number and let the phone add the exit code for you.