Area Code 231-525 located in AFTON, CHEBOYGAN, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 525 City : AFTON County : CHEBOYGAN State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26031 LATA (Local Access Transport Area) : 348 Rate Center : WOLVERINE ZIP Code Count : 24 ZIP Code Frequency : 2 ZIP Code : 49705 Other Information NPANXX : 231525 County Population : 0 Switch CLLI (Common Language Location Identifier) : WLVRMIMNRSA Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : AMERITECH MICHIGAN OCN (Operating Company Number) : 9323 Coverage Area Name : WOLVERINE Latitude : 45.2744 Longitude : -84.6058 ‹ previous : 231-525 next › : 231-525 Telephone Number List 231-525-0000 ~ 231-525-9999