Area Code 810-203 located in APPLEGATE, SANILAC, MI, more detail is as below. Place NPA (Numbering Plan Area) : 810 NXX (Local Number Prefix) : 203 City : APPLEGATE County : SANILAC State : MI (Michigan) NXX Use Type : Wireless NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 26151 LATA (Local Access Transport Area) : 340 Rate Center : APPLEGATE ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 48401 Other Information NPANXX : 810203 Switch CLLI (Common Language Location Identifier) : DTRTMIAPCM3 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : AMERICAN MESSAGING (AM), INC. OCN (Operating Company Number) : 9748 Coverage Area Name : APPLEGATE Latitude : 43.3494 Longitude : -82.6380 ‹ previous : 810-201 next › : 810-204 Telephone Number List 810-203-0000 ~ 810-203-9999