Area Code 231-255 located in ONEKAMA, MANISTEE, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 255 City : ONEKAMA County : MANISTEE State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26101 LATA (Local Access Transport Area) : 348 Rate Center : ONEKAMA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49675 Other Information NPANXX : 231255 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIBHCM0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : USA MOBILITY WIRELESS, INC. OCN (Operating Company Number) : 6630 Coverage Area Name : ONEKAMA Latitude : 44.3672 Longitude : -86.2042 ‹ previous : 231-250 next › : 231-256 Telephone Number List 231-255-0000 ~ 231-255-9999