Area code 312
External links
Map of Illinois area codes at North American Numbering Plan Administration's website List of exchanges from AreaCodeDownload.com, 312 Area Code

Area code 312

Section Title: External links
Table Section Text: Map of Illinois area codes at North American Numbering Plan Administration's website List of exchanges from AreaCodeDownload.com, 312 Area Code

Illinois area codes: 217, 224/847, 309, 312, 331/630, 618, 708, 773, 779/815, 872

North: 773

West: 773	area code 312 (overlaid by 872)	East: Lake Michigan

South: 773

Sentence(s)

312 has been overlaid by 872.

final_sentence: 312 has been overlaid by 872.