Area code 312 - Wikipedia
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. The numbering plan area is completely surrounded by area code 773, which serves the rest of Chicago.
312 Area Code - Map, Phone Lookup, Time Zone - Wirefly
Find 312 area code details including city, time zone, and map. Lookup area code 312 phone number, name, and location.
312 Area Code Phone Numbers - Whitepages
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 — information, time zone, map
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.
312 Area Code - Location, Time, Map, Cities and Census Data - ZIP …
2025年1月1日 · 312 Area Code located in Illinois, including 16 cities, 3 counties, 1 time zone, map, Census demographics, and 778 active prefixes.
Area Code 312
Lookup information on Area Code 312 - get demographic, NPA NXX, and other data by area code
Area Code 312 - Map, time zone, and phone lookup - CallerCenter
About area code 312: location, common spam callers, related area codes, and more. Includes 312 reverse phone lookup to identify spam callers.
312 Area Code - History, Location, Dialing Format, and Zip codes
The 312 area code is Chicago’s historic telephone code, established by the North American Numbering Plan Administrator (NANPA) in 1947. It is one of the leading telephone codes for this central business area of Chicago, including downtown and the Chicago Loop, with its vibrant music scene and great architecture.
Area code 312 - Simple English Wikipedia, the free encyclopedia
Area code 312 is an area code that is part of Illinois. It was one of the first area codes created in 1947. It initially covered the entire northeastern portion of Illinois, but after it was split by 708 in 1989, 630, 847, and 773, all in 1996, it now covers only downtown Chicago, with 708 and 773 covering the rest of Chicago.
312 Area Code - Location, Map, Current Time, Prefixes
Area code 312 is located in Illinois. Get the area’s map, cities covered, current time, prefixes, and dialing instructions.
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