Area Code 217-770 located in MOUNT STERLING, BROWN, IL, more detail is as below. Place NPA (Numbering Plan Area) : 217 NXX (Local Number Prefix) : 770 City : MOUNT STERLING County : BROWN State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 2002-08-04 FIPS (Federal Information Processing Standards) : 17009 LATA (Local Access Transport Area) : 376 Rate Center : MTSTERLING ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 62353 Other Information NPANXX : 217770 County Population : 0 Switch CLLI (Common Language Location Identifier) : GLDNILAACM0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : UNITED STATES CELLULAR CORP. - ILLINOIS OCN (Operating Company Number) : 6265 Coverage Area Name : MT STERLING Latitude : 39.9877 Longitude : -90.7650 ‹ previous : 217-769 next › : 217-771 Telephone Number List 217-770-0000 ~ 217-770-9999