Area Code 872-777 located in CHICAGO, COOK, IL, more detail is as below. Place NPA (Numbering Plan Area) : 872 NXX (Local Number Prefix) : 777 City : CHICAGO County : COOK State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 9/14/2010 FIPS (Federal Information Processing Standards) : 17031 LATA (Local Access Transport Area) : 358 Rate Center : CHICGOZN07 ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 60637 Other Information NPANXX : 872777 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 Overlay : L Company : CYGNUS TELECOMMUNICATIONS CORPORATION - IL OCN (Operating Company Number) : 161F Coverage Area Name : CHICAGO Latitude : 41.7680 Longitude : -87.6220 ‹ previous : 872-702 next › : 872-800 Telephone Number List 872-777-0000 ~ 872-777-9999