- Location
A split from ‘512 area code’ in 1992 produced the original ‘210 area code’ (under the planning letter IL-92/03-068) and is a ‘telephone area code.’ The ‘210 area code’ encompasses San Antonio and surrounding cities across ‘Atascosa, Bexar, Comal, Guadalupe, Medina, and Wilson’ counties, reflecting a diverse ‘urban and semi-rural’ geographic landscape in South Texas.