Area Code 217-300 located in CHICAGO, COOK, IL, more detail is as below. Place NPA (Numbering Plan Area) : 217 NXX (Local Number Prefix) : 300 City : CHICAGO County : COOK State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 2005-03-27 FIPS (Federal Information Processing Standards) : 17031 LATA (Local Access Transport Area) : 370 Rate Center : CHICGOZN01 ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 60603 Other Information NPANXX : 217300 County Population : 0 Switch CLLI (Common Language Location Identifier) : CHCGILWB4CD MSA CBSA (Core Based Statistical Area) : Chicago-Naperville-Joliet, IL-IN-WI MSA CBSA Code (Core Based Statistical Area) : 16980 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : MCLEODUSA TELECOMMUNICATIONS SERVICES, INC.- IL OCN (Operating Company Number) : 7393 Coverage Area Name : CHICAGO Latitude : 41.8755 Longitude : -87.6290 ‹ previous : 217-300 next › : 217-301 Telephone Number List 217-300-0000 ~ 217-300-9999