210 Area Code

The 210 area code is a telephone area code in the United States assigned to the south-central region of Texas, primarily covering the city of San Antonio and its surrounding metropolitan area. It is one of the most recognized Texas area codes due to San Antonio�s size, history, and economic importance.

Understanding the 210 Area Code

Area code 210 was created on November 1, 1992, in a split from the original 512 area code. It was later split in 1997, creating 830 for surrounding rural areas, while 210 continued to serve central San Antonio. In 2017, the 726 area code overlay was introduced, requiring 10-digit dialing for all calls within the region.

Where Is the 210 Area Code Located? (Map & Counties)

The 210 area code map shows coverage across much of Bexar County, with San Antonio as the primary city. It also extends into small parts of adjacent counties such as Comal and Medina, though most surrounding regions use 830. The NANPA and Texas Public Utility Commission define the exact rate centers.

Major Cities and Areas in the 210 Area Code Region

  • San Antonio - the primary city, second most-populous in Texas
  • Leon Valley
  • Alamo Heights
  • Converse
  • Castle Hills
  • Live Oak
  • Universal City (partly in 210, partly in 830)

San Antonio is known for landmarks such as the Alamo, the River Walk, and its role as a major cultural and economic hub in Texas.

ZIP Codes (Representative) in the 210 Telephone Zone

Examples of ZIP codes within the 210 area code include:

  • San Antonio - 78201, 78205, 78209, 78230, 78232, 78258
  • Alamo Heights - 78209
  • Leon Valley - 78238
  • Converse - 78109

Note: ZIP codes do not exactly align with area code boundaries; these are representative areas.

Time Zone

The 210 area code lies in the Central Time Zone (CT). It observes Central Standard Time (CST, UTC-6) in winter and Central Daylight Time (CDT, UTC-5) during daylight saving time.

Dialing Guide - Phone, Number & Examples

  • Local calls (210 & 726 overlay): Must dial 10 digits (area code + number).
  • Long-distance (within U.S. & Canada): Dial 1 + area code + number.
  • International calls to 210: Dial your exit code, then +1 210 followed by the 7-digit local number. (Example: +1 210 555 0199)

Due to the overlay with 726, 10-digit dialing is mandatory even for local calls.

What area code is 210? / Where's area code 210?

What area code is 210? - The 210 area code is assigned to San Antonio, Texas, and its nearby suburbs.

Where's area code 210? - It�s located in Bexar County, Texas, covering most of the San Antonio metro region.

Frequently Asked Questions (FAQ) about 210 Area Code

When was the 210 area code created?

210 was created in 1992 from a split of the 512 area code.

Does 210 have an overlay?

Yes, the 726 overlay was implemented in 2017, requiring 10-digit dialing.

Which city uses the 210 area code?

The primary city is San Antonio, Texas, along with nearby suburbs such as Leon Valley, Alamo Heights, and Converse.

What time zone is 210 in?

The 210 area code is in the Central Time Zone (CST/CDT).

How do I call a 210 number from outside the U.S.?

Dial your country�s exit code, then +1 210, followed by the 7-digit number. Example: +1 210 555 0199.

210 Area Code