Area Code 618-373 located in COLLINSVILLE, MADISON, IL, more detail is as below. Place NPA (Numbering Plan Area) : 618 NXX (Local Number Prefix) : 373 City : COLLINSVILLE County : MADISON State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2001-03-03 FIPS (Federal Information Processing Standards) : 17119 LATA (Local Access Transport Area) : 362 Rate Center : ELDORADO ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 62234 Other Information NPANXX : 618373 Switch CLLI (Common Language Location Identifier) : MTRPILAX0MD 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 : AERO COMMUNICATIONS, INC - IL OCN (Operating Company Number) : 3808 Coverage Area Name : ELDORADO Latitude : 37.8239 Longitude : -88.4448 ‹ previous : 618-372 next › : 618-374 Telephone Number List 618-373-0000 ~ 618-373-9999