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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.
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.
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.
630/331: West suburbs of Chicago in DuPage County and Kane County including Wheaton, Naperville, and Aurora. Area code 630 was overlaid with area code 331 in 2007.
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.
331 Area Code located in Illinois, including 31 cities, 5 counties, 1 time zone, map, Census demographics, and 183 active prefixes.
Key Facts: Location: Illinois (western suburbs of Chicago, including DuPage, central and southern Kane, northern Kendall, far northern Will, and small portions of Cook counties) Timezone: Central. Current time: 9:34pm.
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.
Area codes 630 and 331 under the North American Numbering Plan in the United States, cover portions of Chicago's near and far western suburbs, including the majority of DuPage County, Illinois. To the northwest, the area codes also cover a small, neighboring portion of Cook County, including parts of Schaumburg, Streamwood and Hanover Park.
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. To the northwest, the numbering plan area (NPA) also includes a small portion of Cook County, includi