312 Area Code - Location map, time zone, and phone lookup
Where is area code 312? Area code 312 serves part of Chicago, IL. It overlaps coverage areas with area code 872.
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.
312 area code — information, time zone, map
2 days ago · 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. …
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 - 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 - National Phone Number Registry
Jan 3, 2026 · Area code 312 is located in Illinois. Get area code location and dialing plans for all phone prefixes in area code 312.
312 Area Code: Complete Location Info, Time Zone
Nov 22, 2025 · 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.
312 Area Code: Chicago, IL | Location & Time Zone
The 312 area code is a geographic telephone area code serving downtown Chicago and the immediate surrounding areas in Cook County, Illinois. Established in 1947 as part of the original …
312 Area Code - Where Is It? | Illinois Phone Numbers | Area Code …
Got a call from 312? That's Illinois - specifically areas like Chicago. Check the time zone and see if it might be spam.
312 area code - Area Code Book
Area code 312 serves the entire state of Illinois in United State, providing phone services to both residential and business users. It covers urban, suburban, and rural areas alike, ensuring …
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