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The 1997 split made San Antonio one of the few cities split between two area codes. Some portions of San Antonio located in Medina and Comal counties, as well as a few portions of Bexar County, are in 830. However, because most of San Antonio and Bexar County are in the 210 area code, "210" has become part of the area's identity and culture.
726: San Antonio area; overlays with 210 (October 2017) 737: Austin, San Marcos, Kyle, Lampasas, Bastrop, Milam and Central Texas, overlays with 512 (July 2013)
Area code 830 is the telephone area code in the North American Numbering Plan (NANP) for the Texas Hill Country and most of San Antonio's suburbs. It completely surrounds area codes 210 and 726, which serve most of San Antonio itself along with its innermost suburbs. It was created July 7, 1997, in a split from 210.
Typically, the largest city in an existing area code keeps the original code, which in this case would have been San Antonio. However, state regulators decided that having the Austin area keep 512 would spare the large number of state agencies in and around the state capital from the expense and disruption of changing their numbers.
Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
California (Daly City, South San Francisco, Palo Alto, Redwood City, Menlo Park, Mountain View, San Mateo, Santa Clara) August 2, 1997: split of 415; 651: Minnesota (St. Paul, Eagan, Lindstrom, Red Wing, Hastings, Stillwater, and a part of east-central Minnesota) July 12, 1998: split of 612; 652–654: not in use; available for geographic ...