Area Code 248-203 located in BIRMINGHAM, OAKLAND, MI, more detail is as below. Place NPA (Numbering Plan Area) : 248 NXX (Local Number Prefix) : 203 City : BIRMINGHAM County : OAKLAND State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1997-07-06 FIPS (Federal Information Processing Standards) : 26125 LATA (Local Access Transport Area) : 340 Rate Center : BIRMINGHAM ZIP Code Count : 419 ZIP Code Frequency : 38 ZIP Code : 48009 Other Information NPANXX : 248203 County Population : 0 Switch CLLI (Common Language Location Identifier) : BRHMMIMNDS0 MSA CBSA (Core Based Statistical Area) : Detroit-Warren-Livonia, MI MSA CBSA Code (Core Based Statistical Area) : 19820 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : AMERITECH MICHIGAN OCN (Operating Company Number) : 9323 Coverage Area Name : BIRMINGHAM Latitude : 42.5457 Longitude : -83.2167 ‹ previous : 248-203 next › : 248-204 Telephone Number List 248-203-0000 ~ 248-203-9999