Area code 630 and 331
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Area_code_630_and_331".

Area codes 630 and 331 are coterminous area codes, under the North American Numbering Plan in the United States, that 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 the villages of Streamwood and Hanover Park. To the west, Kane County is divided between area codes 847 and 224 in the north, including Elgin, and area codes 630 and 331 in the south, including Aurora. To the south, the northern part of Will County and a small part of southern Cook County, including the village of Burr Ridge and parts of the village of Lemont, are also included in the 630 and 331 area codes. To the southwest, the city of Yorkville, in exurban Kendall County, is included, as well.

On October 7, 2007, when area code 331 began overlaying area code 630, ten-digit dialing was implemented in both area codes. In 1996, area code 630 had split off from area code 708 and in 1989, area code 708 had split off from area code 312.

Communities included

See also

• List of North American Numbering Plan area codes
• List of Illinois area codes

External links

• Map of Illinois area codes at North American Numbering Plan Administration's website

Coordinates: 41°50′N 88°06′W / 41.833, -88.1

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