Area Code 872-999 located in CHICAGO, COOK, IL, more detail is as below. Place NPA (Numbering Plan Area) : 872 NXX (Local Number Prefix) : 999 City : CHICAGO County : COOK State : IL (Illinois) NXX Use Type : Landline NXX Intro Version : 12/21/2012 FIPS (Federal Information Processing Standards) : 17031 LATA (Local Access Transport Area) : 358 Rate Center : CHICGOZN02 ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 60604 Other Information NPANXX : 872999 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 : NEUTRAL TANDEM-ILLINOIS, LLC - IL OCN (Operating Company Number) : 505B Coverage Area Name : CHICAGO Latitude : 41.8736 Longitude : -87.6373 ‹ previous : 872-888 next › : 878-201 Telephone Number List 872-999-0000 ~ 872-999-9999