Area Code 312 Phone Directory
Phone Numbers that start with (312) XXX-XXXX
Information for Area Code 312
- State: IL
- Largest City: CHICAGO
Where is Area Code 312?
Area code (312) is in the state of IL. Below, are the major cities in the area code (312).Area Codes Starting with 3
- (300) xxx-xxxx
- (301) xxx-xxxx
- (302) xxx-xxxx
- (303) xxx-xxxx
- (304) xxx-xxxx
- (305) xxx-xxxx
- (306) xxx-xxxx
- (307) xxx-xxxx
- (308) xxx-xxxx
- (309) xxx-xxxx
- (310) xxx-xxxx
- (312) xxx-xxxx
- (313) xxx-xxxx
- (314) xxx-xxxx
- (315) xxx-xxxx
- (316) xxx-xxxx
- (317) xxx-xxxx
- (318) xxx-xxxx
- (319) xxx-xxxx
- (320) xxx-xxxx
- (321) xxx-xxxx
- (322) xxx-xxxx
- (323) xxx-xxxx
- (324) xxx-xxxx
- (325) xxx-xxxx
Major Cities in Area Code 312
- Rank:2009539
- Chicago, IL
- Rank:59550
- Evanston, IL
- Rank:47220
- Oak Park, IL
- Rank:47102
- New York, NY
- Rank:40576
- Naperville, IL
- Rank:31552
- Skokie, IL
- Rank:31472
- Des Plaines, IL
- Rank:28329
- Arlington Heights, IL
- Rank:28066
- Schaumburg, IL
- Rank:28054
- Highland Park, IL
- Rank:27987
- Los Angeles, CA
- Rank:27741
- Glenview, IL
- Rank:26608
- Oak Lawn, IL
- Rank:26061
- Milwaukee, WI
- Rank:25201
- Northbrook, IL
- Rank:24693
- Cicero, IL
- Rank:24382
- Calumet City, IL
- Rank:24012
- Berwyn, IL
- Rank:22499
- Aurora, IL
- Rank:22226
- Palatine, IL
Zip codes in Area Code 312
- 60601
- 60602
- 60603
- 60604
- 60605
- 60606
- 60607
- 60608
- 60609
- 60610
- 60611
- 60612
- 60613
- 60614
- 60615
- 60616
- 60617
- 60618
- 60619
- 60620
- 60621