312-431-####

Phone TypeLandline
Carrier/CompanyAmeritech Illinois
CityChicago
CountyCook
County Population5194675
StateIL
Introduced1997-10-11
LATA358
ZIP Code60603
Rate CenterChicgozn01
Time ZoneCentral (GMT -06:00)
Observes DSTUnknown
CBSA NameChicago-Naperville-Elgin, IL-IN-WI
OCN9329
FIPS17031
CBSA Code16980

Phone Number Ranges with Prefix 312-431