312 Area Code - Location, Time, Map, Cities and Census Data
https://www.zip-codes.com/area-code/area-code-312.asp
WebApr 1, 2024 · 312 Area Code. Download Area Code Database. Load 312 Area Code Map. Important 312 Area Code Information. Area Code 312 is located in Illinois. It covers 16 cities, including Chicago, Cicero, Schaumburg, Glenview, and Buffalo Grove. It also covers 3 counties, including Cook County, Lake County, Dupage County.
DA: 38 PA: 97 MOZ Rank: 50 Up or Down: Up