Area code 312 is a telephone area code in the North American Numbering Plan for the city of Chicago, including downtown, the Chicago Loop, and its immediate environs.
Lookup area code 312 details: major cities and timezone. View the 312 area code map in Illinois. Find the name of any phone number in area code 312.
Browse area code 312 phone numbers, prefixes and exchanges. The 312 area code serves Chicago, Willowbrook, Elgin, Arlington Heights, Naperville, covering 23 ZIP codes in 4 counties.
312 Area Code located in Illinois, including 16 cities, 3 counties, 1 time zone, map, Census demographics, and 778 active prefixes.
312 is an area code located in the state of Illinois, US. The largest city it serves is Chicago. Find out where 312 area code zone from, which states, counties and cities it covers. Get the most exact information on time zones here.
Find 312 area code details including city, time zone, and map. Lookup area code 312 phone number, name, and location.
Area code 312 is in Illinois, USA. Locate phone numbers 312-200-XXXX through 312-999-XXXX. City list with local time, map and overlaying areas.
Area Code 312 Map and Data Area Code 312 Profile ... Area Code 312 Boundary Map List of ZIP Codes in Area Code 312
Area code 312 serves the city of Chicago, specifically downtown, the Chicago Loop, and its immediate surrounding areas. It is bounded by North Avenue on the north, Western Avenue on the west, and 35th Street on the south, with Lake Michigan to the east.