Area codes 630 and 331 under the

North American Numbering Plan The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the international callin ...

in the

United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...

, cover portions of Chicago's near and far western suburbs, including the majority of

DuPage County, Illinois DuPage County ( ) is a county in the U.S. state of Illinois, and one of the collar counties of the Chicago metropolitan area. As of the 2020 census, the population was 932,877, making it Illinois' second-most populous county. Its county seat is ...

. 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 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 Burr Ridge (formerly Harvester) is a village in Cook and DuPage counties in the U.S. state of Illinois. A suburb of Chicago, it is among the wealthiest towns in Illinois and is locally known for its large, elegant mansions and luxury lifestyles. ...

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 __NOTOC__ Year 847 ( DCCCXLVII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. Events By place Europe * Danish Vikings land in the Breton March (western part of Gaul). Duke Nominoe ...

. 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 __NOTOC__ Year 773 ( DCCLXXIII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 773 for this year has been used since the early medieval period, when the Anno Domini calendar e ...

872 Year 872 ( DCCCLXXII) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar. Events By place Europe * Sancho III Mitarra (or ''Menditarra'') becomes the founder and first 'king' of the indepen ...

, 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 Addison may refer to: Places Canada * Addison, Ontario United States *Addison, Alabama *Addison, Illinois *Addison Street in Chicago, Illinois which runs by Wrigley Field *Addison, Kentucky *Addison, Maine *Addison, Michigan *Addison, New York * ...

* 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 Batavia may refer to: Historical places * Batavia (region), a land inhabited by the Batavian people during the Roman Empire, today part of the Netherlands * Batavia, Dutch East Indies, present-day Jakarta, the former capital of the Dutch East In ...

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 Bristol () is a city, ceremonial county and unitary authority in England. Situated on the River Avon, it is bordered by the ceremonial counties of Gloucestershire to the north and Somerset to the south. Bristol is the most populous city in ...

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 *

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 Downers Grove is a village in DuPage County, Illinois, United States. It was founded in 1832 by Pierce Downer, whose surname serves as the eponym for the village. It is a south-west suburb of Chicago. The village is located between I-88 and I-55. ...

* Elburn * Elmhurst *

Geneva Geneva ( ; french: Genève ) frp, Genèva ; german: link=no, Genf ; it, Ginevra ; rm, Genevra is the List of cities in Switzerland, second-most populous city in Switzerland (after Zürich) and the most populous city of Romandy, the French-speaki ...

* Glendale Heights *

Glen Ellyn Glen Ellyn is a village in DuPage County, Illinois, United States. A suburb located due west of downtown Chicago, the village has a population of 28,846 as of the 2020 Census. History Glen Ellyn, like the neighboring town to the east, Lomba ...

* Hanover Park * Hinsdale * Itasca * Kaneville * La Fox * Lemont * Lily Lake * Lisle *

Little Rock ( The "Little Rock") , government_type = Council-manager , leader_title = Mayor , leader_name = Frank Scott Jr. , leader_party = D , leader_title2 = Council , leader_name2 ...

* Lombard *

Medinah Medina,, ', "the radiant city"; or , ', (), "the city" officially Al Madinah Al Munawwarah (, , Turkish: Medine-i Münevvere) and also commonly simplified as Madīnah or Madinah (, ), is the Holiest sites in Islam, second-holiest city in Islam, ...

* Millbrook * Montgomery * Mooseheart *

Naperville Naperville ( ) is a city in DuPage and Will counties in the U.S. state of Illinois. It is in the Chicago metro area, west of the city. Naperville was founded in 1831 by Joseph Naper. The city was established by the banks of the DuPage river, ...

* North Aurora * Oak Brook *

Oakbrook Terrace Oakbrook Terrace is a city in DuPage County, Illinois, and is a suburb of Chicago. Per the 2020 census, the population was 2,751. It is the smallest town in DuPage County, in terms of area and population. History Oakbrook Terrace was original ...

* Oswego * Plano * Plattville * Roselle *

* St. Charles * Streamwood * Sugar Grove *

Villa Park Villa Park is a football stadium in Aston, Birmingham, England, with a seating capacity of 42,682. It has been the home of Premier League side Aston Villa since 1897. The ground is less than a mile from both Witton and Aston railway stations ...

Virgil Publius Vergilius Maro (; traditional dates 15 October 7021 September 19 BC), usually called Virgil or Vergil ( ) in English, was an ancient Roman poet of the Augustan period. He composed three of the most famous poems in Latin literature: t ...

* Warrenville * Wayne *

Wasco Wasco is the name of four places in the United States: Places United States * Wasco, California, a city in California ** Wasco State Prison, located in Wasco, California * Wasco, Illinois, a former hamlet (unincorporated town) in Illinois, now pa ...

West Chicago West Chicago is a city in DuPage County, Illinois, United States. The population was 27,086 at the 2010 census. It was formerly named Junction and later Turner, after its founder, John B. Turner, president of the Galena and Chicago Union Railroad ...

* Westmont * Wheaton * Willowbrook * Winfield *

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 Year 630 ( DCXXX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. The denomination 630 for this year has been used since the early medieval period, when the Anno Domini calendar era became the ...

Telecommunications-related introductions in 1996 Telecommunications-related introductions in 2007

Communities included

See also

References

External links