312 Area Code Details

312 area code is located in the state/province of IL and has a total of 10 citie(s), 4 countie(s), and 100 zip code(s).

312 Area Code Cities

Wheeling (22)Roselle (3)
Northbrook (7)La Grange Park (14)
Hinsdale (20)Grayslake (2)
Elk Grove Village (1)Des Plaines (1)
Cocoa (1)Chicago (1927)

312 Area Code Rate Centers

Xxxxxxxxxx Wheeling
Roselle Northbrook
La Grange Hinsdale
Des Plaine Cocoa
Chicgozn04 Chicgozn01
Chicago Zo Chicago
Chcz 1

List of Area Code and Exchange Combinations for 312 Phone Numbers