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  1. en.m.wikipedia.org › wiki › Area_codes_630_and_331Area codes 630 and 331 - Wikipedia

    Area codes 630 and 331 are telephone area codes in the North American Numbering Plan (NANP) for portions of Chicago 's near and far western suburbs, including the majority of DuPage County, Illinois.

  2. www.wirefly.com › area-codes › 630630 Area Code - Map, Phone Lookup, Time Zone | Wirefly

    Area code 630 serves the state of Illinois. This area code was assigned on August 9th, 1994. On August 3rd, 1996 it went into service. 630 is a General Purpose Code. 630 service area does overlap with 331 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

  3. npnr.org › 331331 Area Code - National Phone Number Registry

    3 days ago · Area code 331 is assigned for use in Illinois since Oct 07, 2007. This area code originated from the 630 area code previously by means of area code split or overlay. View all phone prefixes used in area code 331 or other area codes in Illinois .

  4. www.zip-codes.com › area-code › area-code-331331 Area Code - Location, Time, Map, Cities and Census Data

    Jul 1, 2024 · 331 Area Code located in Illinois, including 31 cities, 5 counties, 1 time zone, map, Census demographics, and 183 active prefixes.

  5. www.wirefly.com › area-codes › 331331 Area Code - Map, Phone Lookup, Time Zone | Wirefly

    Jan 6, 2012 · Area code 331 serves the state of Illinois. This area code was assigned on July 23rd, 1999. On October 7th, 2007 it went into service. 331 is a General Purpose Code. 331 service area does overlap with 630 area codes. Dialing pattern for local calls within the same NPA (area code) is 1+10D.

  6. phonebookofillinois.com › area-code-630Area Code 630 and 331 & ALL area codes in Illinois

    Q: Are area codes 630 and 331 overlaid with another area code? A: Yes, area code 331 is an overlay of area code 630. It means that both area codes serve the same geographic area.

  7. www.zipdatamaps.com › area-code-331Area Code 331 - Illinois - Zipdatamaps

    Oct 7, 2007 · Profile and Interactive Map for Area Code 331 in Illinois - July, 2024.

  8. www.areacodeguide.com › 331-area-codeWhere Is The 331 Area Code Located? City Guide | State | Location

    Jun 22, 2024 · The 331 area code is used for Naperville as well as its neighbor Aurora. As a fairly recent area code, it was implemented as an overlay to the 630 area code in 2007. Currently, the 331 area code is mainly preserved for small suburbs of western Chicago, including a few neighborhoods in the Cook and Dupage Counties.

  9. teracodes.com › area-codes › 630630 Area Code: Location, prefixes, cities, map, time zone and ...

    Area code 630 is located in N Illinois and includes Naperville. View the 630 area code map, major cities, location, timezone and more on TeraCodes.com.

  10. www.wirefly.com › area-codes › illinoisChicago, IL Area Codes: List, Map, and Phone Lookup | Wirefly

    Chicago, IL has the following Exchanges (NXX) List of all area codes in Chicago, IL. Chicago, IL area code map, list, and phone lookup.

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