Area Code 217-812 located in CLAYTON, ADAMS, IL, more detail is as below. Place NPA (Numbering Plan Area) : 217 NXX (Local Number Prefix) : 812 City : CLAYTON County : ADAMS State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2006-02-16 FIPS (Federal Information Processing Standards) : 17001 LATA (Local Access Transport Area) : 376 Rate Center : CLAYTON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 62324 Other Information NPANXX : 217812 County Population : 0 Switch CLLI (Common Language Location Identifier) : GLDNILAADS0 MSA CBSA (Core Based Statistical Area) : Quincy, IL-MO MSA CBSA Code (Core Based Statistical Area) : 39500 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : ADAMS TELSYSTEMS, INC. OCN (Operating Company Number) : 7091 Coverage Area Name : CLAYTON Latitude : 40.0334 Longitude : -90.9554 ‹ previous : 217-810 next › : 217-813 Telephone Number List 217-812-0000 ~ 217-812-9999