Area Code 618-300 located in CASEYVILLE, SAINT CLAIR, IL, more detail is as below. Place NPA (Numbering Plan Area) : 618 NXX (Local Number Prefix) : 300 City : CASEYVILLE County : SAINT CLAIR State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2005-03-27 FIPS (Federal Information Processing Standards) : 17163 LATA (Local Access Transport Area) : 362 Rate Center : CHICGOZN01 ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 62232 Other Information NPANXX : 618300 Switch CLLI (Common Language Location Identifier) : CHCGILWB4CD 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 : YMAX COMMUNICATIONS CORP. - IL OCN (Operating Company Number) : 259E Coverage Area Name : COLLINSVILLE Latitude : 38.6787 Longitude : -89.9831 ‹ previous : 618-299 next › : 618-300 Telephone Number List 618-300-0000 ~ 618-300-9999