Area Code 231-319 located in MACKINAW CITY, CHEBOYGAN, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 319 City : MACKINAW CITY County : CHEBOYGAN State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2001-03-03 FIPS (Federal Information Processing Standards) : 26031 LATA (Local Access Transport Area) : 348 Rate Center : MACKINAWCY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49701 Other Information NPANXX : 231319 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRQMIFOCA0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : TELNET WORLDWIDE, INC. OCN (Operating Company Number) : 4632 Coverage Area Name : MACKINAW CITY Latitude : 45.7810 Longitude : -84.7332 ‹ previous : 231-318 next › : 231-320 Telephone Number List 231-319-0000 ~ 231-319-9999