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 Schaumburg is a district (''Landkreis'') of Lower Saxony, Germany. It is bounded by (clockwise from the north) the districts of Nienburg, Hanover and Hamelin-Pyrmont, and the state of North Rhine-Westphalia (districts of Lippe and Minden-Lübbe ...

Streamwood Streamwood is a village in Cook County, Illinois, United States. Per the 2020 census, the population was 39,577. It is a northwest suburb of Chicago, and is a part of the Chicago metropolitan area. Streamwood is one of the three communities that ...

and Hanover Park. To the west, Kane County is divided between area codes 847 and 224 in the north, including

Elgin Elgin may refer to: Places Canada * Elgin County, Ontario * Elgin Settlement, a 19th-century community for freed slaves located in present-day North Buxton and South Buxton, Chatham-Kent, Ontario * Elgin, a village in Rideau Lakes, Ontario ...

, 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 An exurb (or alternately: exurban area) is an area outside the typically denser inner suburban area, at the edge of a metropolitan area, which has some economic and commuting connection to the metro area, low housing density, and growth. It sh ...

Kendall County, is included, as well. The main area code, 630 was split off from area code 708 on August 3, 1996 in a three-way split, with the southern suburbs keeping 708 and the northern suburbs splitting into 847. Within a decade, 630 was close to exhaustion due to the explosive growth of the Chicago suburbs and the proliferation of cell phones and pagers. On October 7, 2007, area code 331 began overlaying area code 630, making ten-digit dialing mandatory in the area. The Illinois side of the Chicago area–

312 __NOTOC__ Year 312 ( CCCXII) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Constantinus and Licinianus (or, less frequently, ...

/ 773/ 872, 708, 847/224, 630/331 and portions of 815/779–is one of the largest local calling areas in the United States; with few exceptions, no long-distance charges are applied from one portion of the metro area to another.

Communities included

* Addison * Aurora *

Bartlett Bartlett may refer to: Places *Bartlett Bay, Canada, Arctic waterway * Wharerata, New Zealand, also known as Bartletts United States * Bartlett, Illinois ** Bartlett station, a commuter railroad station * Bartlett, Iowa Bartlett is an uninc ...

* Batavia *

Bensenville Bensenville is a village located near O'Hare International Airport in DuPage County, Illinois, with a portion of the town in Cook County. As of the 2020 census, the village population was 18,813. First known as Tioga, it was formally established ...

* Big Rock * Bloomingdale *

Bolingbrook The village of Bolingbrook is a southwest suburb of Chicago in Will and DuPage counties in the U.S. state of Illinois. Per the 2020 census, the population was 73,922. As of 2010, it is the 17th largest incorporated place in Illinois and the sta ...

* Boulder Hill * Bristol * Burr Ridge *

Campton Hills Campton Hills is a village (United States), village in Kane County, Illinois and is a western suburb of Chicago. The population of the village is 11,131 per the 2010 US Census. The village was established on May 14, 2007, by municipal corporation ...

Carol Stream Carol Stream is a village in DuPage County, Illinois, United States, and a suburb of Chicago. Carol Stream was incorporated on January 5, 1959, and named after its founder's daughter. Per the 2020 census, the population was 39,854. History ...

Clarendon Hills Clarendon Hills is a village in DuPage County, Illinois, United States. The population was 8,427 at the 2010 census. It is a south-western suburb of Chicago. History In 1961, TWA Flight 529 crashed in Clarendon Hills, killing all 73 passengers o ...

* Darien * Downers Grove *

Elburn Elburn is a village in Kane County, Illinois, United States. The population was 5,602 as of the 2010 census, up from 2,756 at the 2000 census. It is located at the intersection of Illinois Route 38 and Route 47. Elburn is a town situated w ...

* Elmhurst * Geneva *

Glendale Heights Glendale Heights is a village in DuPage County, Illinois, United States. Per the 2020 census, the population was 33,176. History Glendale Heights was a small farming area served by the Glen Ellyn post office up until the 1950s, with a populat ...

* Glen Ellyn * Hanover Park * Hinsdale * Itasca *

Kaneville Kaneville is a village in southwestern Kane County, Illinois, United States. It was incorporated in November 2006, and the first elected officials were chosen in elections held on April 17, 2007. The village had a population of 484 at the 201 ...

* La Fox * Lemont * Lily Lake * Lisle * Little Rock * Lombard * Medinah * Millbrook * Montgomery *

Mooseheart Mooseheart, located in Kane County, Illinois, is an unincorporated community and a home for children administered by the Loyal Order of Moose. Also known as the City of Children, the community is featured as a 1949 episode of Metro-Goldwyn-Mayer's ...

* Naperville * North Aurora * Oak Brook * Oakbrook Terrace * Oswego * Plano * Plattville * Roselle *

* St. Charles *

* Sugar Grove * Villa Park * Virgil * Warrenville * Wayne * Wasco * West Chicago * Westmont * Wheaton * Willowbrook *

Winfield Winfield may refer to: Places Canada * Winfield, Alberta * Winfield, British Columbia United States * Winfield, Alabama * Winfield, Arkansas * Winfield, Georgia * Winfield, Illinois * Winfield, Indiana * Winfield, Iowa * Winfield, Kansas * Winfi ...

Wood Dale Wood Dale is a city in Addison Township, DuPage County, Illinois, United States. Per the 2020 census, the population was 14,012. History Wood Dale was originally known as ''Lester's Station'', after John Lester, an early settler. Geography Acco ...

* Woodridge * Yorkville

References

External links

Map of Illinois area codes
at North American Numbering Plan Administration's website
List of exchanges from AreaCodeDownload.com, 630 Area Code
{{DEFAULTSORT:Area Codes 630 And 331 630 630 Telecommunications-related introductions in 1996 Telecommunications-related introductions in 2007

Communities included

See also

References

External links