Area code 210

Area code 210 at a glance

210 is one of 29 geographic area codes serving Texas; NANPA records its in-service date as November 1, 1992. It is an overlay: 210 and 726 cover the same territory, so neighbors on the same street can have different area codes. It is in the Central time zone. The places with the most assigned exchanges include San Antonio.

Cities and towns in area code 210

210 holds 4.9% of the 16,097 central office codes assigned in Texas, the 7th most of the state's 29 codes. 1 Census place could be matched to rate centers with 210 exchanges; the most populous is San Antonio (1.5 million). Each place page lists the exact prefixes and carriers for that town.

Dialing 210 numbers

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. Because local calls need the area code, business cards, signage and website copy should always show the full ten-digit number.

Phone companies in area code 210

35 carriers hold the 784 central office codes assigned in 210. Southwestern Bell has the most, with 280 (36%). 559 of the codes (71%) are pooled, meaning the code holder shares blocks of 1,000 numbers with other carriers instead of using all 10,000 itself. The code holder is not necessarily the carrier serving a given number today, since numbers can be ported between providers.

Rate centers and towns in 210

NANPA assigns each central office code to a rate center, the local calling area that decides whether a call is local or toll. 210 has codes in 1 rate center. Rate center names in the file are abbreviations; where one matches a Census place, the table links to that city's local-number page.

210 code assignments over time

An area code has 800 possible central office codes that start with 2 through 9, a few of which are reserved (such as N11 service codes and 555). 784 are assigned in 210, 98% of 800. 33 were assigned in 2020 or later.

A local 210 number on Callata

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 area code 210 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.