Area Code 231-333 located in CHEBOYGAN, CHEBOYGAN, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 333 City : CHEBOYGAN County : CHEBOYGAN State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2002-08-04 FIPS (Federal Information Processing Standards) : 26031 LATA (Local Access Transport Area) : 348 Rate Center : CHEBOYGAN ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49721 Other Information NPANXX : 231333 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIQLX1Y Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : LEVEL 3 COMMUNICATIONS, LLC - MI OCN (Operating Company Number) : 6120 Coverage Area Name : CHEBOYGAN Latitude : 45.6495 Longitude : -84.4647 ‹ previous : 231-332 next › : 231-334 Telephone Number List 231-333-0000 ~ 231-333-9999