Area Code 618-635 located in STAUNTON, MACOUPIN, IL, more detail is as below. Place NPA (Numbering Plan Area) : 618 NXX (Local Number Prefix) : 635 City : STAUNTON County : MACOUPIN State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 17117 LATA (Local Access Transport Area) : 520 Rate Center : STAUNTON ZIP Code Count : 2286 ZIP Code Frequency : 99 ZIP Code : 62088 Other Information NPANXX : 618635 Switch CLLI (Common Language Location Identifier) : STTNILXEDS0 MSA CBSA (Core Based Statistical Area) : St. Louis, MO-IL MSA CBSA Code (Core Based Statistical Area) : 41180 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : MADISON TELEPHONE CO. OCN (Operating Company Number) : 1049 Coverage Area Name : STAUNTON Latitude : 39.0118 Longitude : -89.7915 ‹ previous : 618-634 next › : 618-636 Telephone Number List 618-635-0000 ~ 618-635-9999