Area code 210, Telephone prefix in San Antonio, United States
Area code 210 is a telephone prefix in San Antonio and surrounding areas within Bexar County in southwestern Texas. It connects residents and businesses across one of the largest cities in the state.
The prefix was created in 1992 when it split from area code 512, which remained assigned to Austin. An overlay plan introduced area code 726 for the same territory in 2017.
The region under area code 210 incorporates numerous telecommunications networks that connect communities across San Antonio and neighboring municipalities.
Callers must dial all ten digits, entering the area code before the local number. This requirement applies to all calls within the region.
In 2017, area code 726 joined as an overlay to the same territory due to the increasing demand for phone numbers in the San Antonio region.
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