Area Code 313-312 located in DETROIT, WAYNE, MI, more detail is as below. Place NPA (Numbering Plan Area) : 313 NXX (Local Number Prefix) : 312 City : DETROIT County : WAYNE State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 10/16/2009 FIPS (Federal Information Processing Standards) : 26163 LATA (Local Access Transport Area) : 340 Rate Center : DETROITZN3 ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 48243 Other Information NPANXX : 313312 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 : US XCHANGE OF MICHIGAN LLC DBA CHOICE ONE COMM MI OCN (Operating Company Number) : 8685 Coverage Area Name : DETROIT Latitude : 42.3320 Longitude : -83.0510 ‹ previous : 313-310 next › : 313-314 Telephone Number List 313-312-0000 ~ 313-312-9999