Area Code 248-307 located in ROYAL OAK, OAKLAND, MI, more detail is as below. Place NPA (Numbering Plan Area) : 248 NXX (Local Number Prefix) : 307 City : ROYAL OAK County : OAKLAND State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 26125 LATA (Local Access Transport Area) : 340 Rate Center : ROYAL OAK ZIP Code Count : 31 ZIP Code Frequency : 25 ZIP Code : 48073 Other Information NPANXX : 248307 County Population : 0 Switch CLLI (Common Language Location Identifier) : TROYMIMNDS0 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 : ROYAL OAK Latitude : 42.5473 Longitude : -83.1357 ‹ previous : 248-306 next › : 248-307 Telephone Number List 248-307-0000 ~ 248-307-9999