San Antonio, Texas

Where Is Area Code 210?

Area code 210 serves San Antonio and nearby parts of south-central Texas. It is centered on Bexar County, where San Antonio is the county seat and largest city. The area sits in the Central Time Zone.

Area code 210 covers much of the San Antonio metropolitan area. It serves San Antonio and nearby communities such as Leon Valley, Balcones Heights, Alamo Heights, Terrell Hills, Castle Hills, and portions of surrounding suburban areas. The exact service area is defined by telephone rate centers and exchange boundaries.

This area includes major San Antonio landmarks and institutions. Notable places in the 210 area include the Alamo, the San Antonio River Walk, Joint Base San Antonio, and the University of Texas at San Antonio. The region lies along the San Antonio River and near the transition between South Texas and the Texas Hill Country.

History of Area Code 210

Area code 210 was created on November 1, 1992, in a split from area code 512. The split was part of a broader effort to add more phone numbers as San Antonio and nearby communities grew. Before 1992, this region used 512.

Area code 210 did not stay unchanged. On July 7, 1997, area code 830 split from 210 and took many surrounding communities outside the urban core. On March 7, 2017, area code 726 began service as an overlay for the same geographic area as 210, which made 10-digit dialing necessary in the region.

Key Facts About Area Code 210

• Area code 210 is in Texas and is centered on San Antonio.
• Area code 210 is in the Central Time Zone.
• Area code 210 was created on November 1, 1992, in a split from area code 512.
• Area code 830 split from area code 210 on July 7, 1997.
• Area code 726 overlays area code 210, and 726 began service on March 7, 2017.
• Area code 210 primarily serves Bexar County, which had a population of 2,009,324 in the 2020 United States Census.
• Major institutions and landmarks in the 210 area include the Alamo, the San Antonio River Walk, Joint Base San Antonio, and the University of Texas at San Antonio.
• Area code 210 is a geographic area code, not a toll-free code.

Frequently Asked Questions

What state is area code 210 in?

Area code 210 is in Texas.

What major cities use area code 210?

Area code 210 mainly serves San Antonio, and it also covers nearby communities such as Leon Valley, Balcones Heights, Alamo Heights, Terrell Hills, and Castle Hills.

Is area code 210 a toll-free number?

No. Area code 210 is a geographic area code for the San Antonio, Texas area.