Area Code 210-257 located in SAN ANTONIO, BEXAR, TX, more detail is as below. Place NPA (Numbering Plan Area) : 210 NXX (Local Number Prefix) : 257 City : SAN ANTONIO County : BEXAR State : TX (Texas) NXX Use Type : Landline NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 48029 LATA (Local Access Transport Area) : 566 Rate Center : SANANTONIO ZIP Code Count : 3 ZIP Code Frequency : 60 ZIP Code : 78250 Other Information NPANXX : 210257 County Population : 0 Switch CLLI (Common Language Location Identifier) : SNANTXCUCG0 MSA CBSA (Core Based Statistical Area) : San Antonio-New Braunfels, TX MSA CBSA Code (Core Based Statistical Area) : 41700 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : SOUTHWESTERN BELL OCN (Operating Company Number) : 9533 Coverage Area Name : SAN ANTONIO Latitude : 29.4846 Longitude : -98.6271 ‹ previous : 210-257 next › : 210-258 Telephone Number List 210-257-0000 ~ 210-257-9999