Area Code 773-879 located in SKOKIE, COOK, IL, more detail is as below. Place NPA (Numbering Plan Area) : 773 NXX (Local Number Prefix) : 879 City : SKOKIE County : COOK State : IL (Illinois) NXX Use Type : Wireless NXX Intro Version : 1999-02-27 FIPS (Federal Information Processing Standards) : 17031 LATA (Local Access Transport Area) : 358 Rate Center : CHICGOZN01 ZIP Code Count : 1 ZIP Code Frequency : 25 ZIP Code : 60077 Other Information NPANXX : 773879 Switch CLLI (Common Language Location Identifier) : LBRDILDGCM3 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 : UNITED STATES CELLULAR CORP. - ILLINOIS OCN (Operating Company Number) : 6265 Coverage Area Name : CHICAGO Latitude : 41.8839 Longitude : -87.6369 ‹ previous : 773-879 next › : 773-880 Telephone Number List 773-879-0000 ~ 773-879-9999