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Area code 312 is a telephone area code for the city of Chicago, Illinois, in the North American Numbering Plan. It is an enclave area code, surrounded by area code 773, and has been overlaid by area code 872 since 2009.
10 mar 2024 · 312 is an area code located in the state of Illinois, US. The largest city it serves is Chicago. Location, time zone and map of the 312 area code
Area code 312 covers the central city of Chicago, Illinois, and includes the Chicago loop extending up to the near north side. The first zip codes, 60601-60607, are assigned for the loop. 60610 and 60611 serve the Gold Coast and Streeterville.
Find out the cities, ZIP codes, and phone prefixes served by area code 312 in Illinois. Learn how to dial local calls within the same NPA and how to use the 10-digit dialing format.
1 lis 2024 · 312 Area Code located in Illinois, including 16 cities, 3 counties, 1 time zone, map, Census demographics, and 779 active prefixes.
Area code 312 is a telephone code for the US state of Illinois (IL). 312 has one timezone: Central
Area code 312 is located in Illinois. Get the area’s map, cities covered, current time, prefixes, and dialing instructions.
