Area Code 217-537 located in HILLSBORO, MONTGOMERY, IL, more detail is as below. Place NPA (Numbering Plan Area) : 217 NXX (Local Number Prefix) : 537 City : HILLSBORO County : MONTGOMERY State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 17135 LATA (Local Access Transport Area) : 976 Rate Center : DONNELLSON ZIP Code Count : 56 ZIP Code Frequency : 10 ZIP Code : 62049 Other Information NPANXX : 217537 County Population : 0 Switch CLLI (Common Language Location Identifier) : DNSNILXCRS0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL OCN (Operating Company Number) : 1183 Coverage Area Name : DONNELLSON Latitude : 39.0324 Longitude : -89.4749 ‹ previous : 217-537 next › : 217-537 Telephone Number List 217-537-0000 ~ 217-537-9999