Area Code 248-312 located in TROY, OAKLAND, MI, more detail is as below. Place NPA (Numbering Plan Area) : 248 NXX (Local Number Prefix) : 312 City : TROY County : OAKLAND State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2000-10-31 FIPS (Federal Information Processing Standards) : 26125 LATA (Local Access Transport Area) : 340 Rate Center : BIRMINGHAM ZIP Code Count : 8 ZIP Code Frequency : 89 ZIP Code : 48098 Other Information NPANXX : 248312 County Population : 0 Switch CLLI (Common Language Location Identifier) : ABHGMIMNDS0 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 : TROY Latitude : 42.6214 Longitude : -83.1693 ‹ previous : 248-312 next › : 248-313 Telephone Number List 248-312-0000 ~ 248-312-9999