Area Code 248-403 located in CLARKSTON, OAKLAND, MI, more detail is as below. Place NPA (Numbering Plan Area) : 248 NXX (Local Number Prefix) : 403 City : CLARKSTON County : OAKLAND State : MI (Michigan) NXX Use Type : Wireless NXX Intro Version : 7/31/2009 FIPS (Federal Information Processing Standards) : 26125 LATA (Local Access Transport Area) : 340 Rate Center : CLARKSTON ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 48348 Other Information NPANXX : 248403 County Population : 0 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 : OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS LLC OCN (Operating Company Number) : 2964 Coverage Area Name : CLARKSTON Latitude : 42.7323 Longitude : -83.4199 ‹ previous : 248-402 next › : 248-404 Telephone Number List 248-403-0000 ~ 248-403-9999