Get a local business phone number in San Antonio, TX

San Antonio area codes

San Antonio city is a Census place in Bexar County, Texas, with an estimated 1,526,656 residents in 2024. NANPA lists 897 exchanges for its rate center across 3 area codes; 210 has the most (784, 87%). 210 is part of an overlay with 726, so a new local number in San Antonio may carry any of those codes depending on which have numbers available. San Antonio is in the Central time zone.

According to NANPA's dialing-plan data, local calls within 210 are dialed as ten digits (area code plus number) and toll calls as 1 plus ten digits.

Who holds San Antonio phone exchanges

52 carriers hold the 897 exchanges assigned to San Antonio's rate center. Southwestern Bell has the most, with 280. 671 of them are pooled codes, which the holder shares with other carriers in blocks of 1,000 numbers. A business number in San Antonio can come from any of these blocks; once it is yours, porting lets it move between providers.

San Antonio phone prefixes

Each prefix below is a block of up to 10,000 numbers that NANPA assigned to San Antonio's rate center (SANANTONIO). The earliest assignment date recorded in the file for these codes is 2001. 136 of the 897 were assigned in 2020 or later.

When San Antonio's exchanges were assigned

The table groups San Antonio's exchanges by the decade NANPA recorded them as assigned.

Rate centers and local calling in San Antonio

NANPA ties every exchange to a rate center. For San Antonio that is SANANTONIO, so a number from one of these exchanges reads as local to people in and around San Antonio.

New local numbers are drawn from carrier inventory, so the exact 210 numbers available change over time; porting an existing number is free.

Businesses around San Antonio

San Antonio is part of the San Antonio-New Braunfels, TX metro area, home to 2.8 million people in 2024. County Business Patterns counted 52,088 business establishments in the San Antonio, TX metro area in 2023, employing 980,355 people. The largest sectors by establishment count are health care and social assistance (6,874), retail trade (6,443), and professional, scientific, and technical services (5,921).

Setting up a San Antonio business line

For $99 a month, Callata puts a team of up to 5 on one plan ($20 for each person after that): up to 3 local numbers, unlimited inbound calls, a pooled allowance of 1,500 outbound US and Canada minutes per user, browser and cell calling, voicemail transcription with urgency triage, recorded calls with AI summaries and business-hours routing, with E911 on every number.

Porting a number you already use in San Antonio is free, and business texting is available once the carrier registration (10DLC) is approved; the registration carries a one-time $49 fee. Which specific numbers are open in a given area code depends on carrier inventory at the time you sign up.

AI agents are optional: an AI receptionist or scheduler can pick up when the team is busy or closed, take a message, send a text or email, or transfer the call. They draw on prepaid AI minutes ($0.25/minute), disclose that they are AI, and outbound AI calls require prior consent and are limited to 8am–9pm.

The comparison below uses 19 users, the rounded average establishment size in the San Antonio, TX metro area. At list prices checked September 28, 2026, that is $474.05 a month on Ooma Office Pro and $570.00 on RingCentral RingEX Core. Callata comes to $379.00 a month for 19 users ($99 a month with 5 users included, then $20 per additional user), below both.