Landline
(312) 996
City: Chicago
County: Cook
Carrier: Ameritech Illinois
View PrefixArea Code 312 Phone Lookup
Illinois, United States
Explore phone numbers, prefixes, and caller activity in New Jersey. View detailed exchange information and community reports for this area code.
Available Prefixes in This Area
Each prefix represents a group of phone numbers tied to a specific carrier and location.
Landline
(312) 997
City: Chicago
County: Cook
Carrier: Ameritech Illinois
View PrefixLandline
(312) 999
City: Chicago
County: Cook
Carrier: Cygnus Telecommunications Corporation - Il
View Prefix