The area code 210 is located in San Antonio, Texas.
Area code 210 serves San Antonio, Texas, in south‑central Texas and covers much of urban Bexar County. It’s the primary San Antonio area code for local phone numbers tied to the city’s historic core, cultural districts, and major business centers. The code was established in 1992 as a split from 512, making it a key identifier for San Antonio callers. Today, 210 works alongside the 726 overlay, so 10‑digit dialing is required across the region.
Major places within the 210 area code include iconic San Antonio landmarks like The Alamo, the River Walk, San Antonio Missions National Historical Park, the Alamodome, and San Antonio International Airport (SAT). The code also covers several small cities and enclaves surrounded by San Antonio:
In 1997, nearby communities moved to area code 830, leaving 210 focused on the city and close‑in suburbs. Most phone numbers you see with 210 are associated with San Antonio addresses, local businesses, tourism, and military sites such as Fort Sam Houston and Lackland Air Force Base. The region observes Central Time (CT), which helps when coordinating calls across Texas and beyond. For modern growth and number availability, 210 is paired with 726 to support new lines without changing existing 210 numbers.
Established: 1992; overlay 726 added 2017 (North American Numbering Plan Administrator)