Area codes 630 and 331 are telephone

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...

s in the

North American Numbering Plan The North American Numbering Plan (NANP) is an integrated 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, World Numbering Zone ...

(NANP) for portions of

Chicago Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of Unite ...

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

DuPage County, Illinois DuPage County ( ) is a County (United States), county in the U.S. state of Illinois, and one of the collar counties of the Chicago metropolitan area. As of the 2020 United States census, 2020 census, the population was 932,877, making it List of ...

. To the northwest, the numbering plan area (NPA) also includes a small portion of

Cook County Cook County is the most populous county in the U.S. state of Illinois and the second-most-populous county in the United States, after Los Angeles County, California. More than 40 percent of all residents of Illinois live within Cook County. ...

, including parts of Schaumburg, Streamwood and Hanover Park. To the west, Kane County is divided between

area codes 847 and 224 Area codes 847 and 224 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of Illinois. The numbering plan area (NPA) comprises the northeastern part of Illinois and many northern suburbs of Chicago. This includ ...

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, Ontario * Elgin, a village in Rideau Lakes, Ontario * Elgin, Manit ...

, and area codes 630 and 331 in the south, including

Aurora An aurora ( aurorae or auroras), also commonly known as the northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in Earth's sky, predominantly observed in high-latitude regions (around the Arc ...

. To the south, the northern part of Will County and a small part of southern

, 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 relatively hi ...

Kendall County, is included, as well. Area code 630 is the parent area code of the numbering plan area, created in a three-way

area code split In telecommunications, an area code split is the practice of introducing a new telephone area code by geographically dividing an existing numbering plan area (NPA), and assigning area codes to the resulting divisions, but retaining the existing a ...

area code 708 Area codes 708 and 464 are telephone area codes in the North American Numbering Plan (NANP) for the southern and western suburbs of Chicago in the U.S. state of Illinois. The numbering plan area comprises most of western and southern Cook County ...

on August 3, 1996, with the southern suburbs keeping 708 and the northern suburbs receiving 847. Within a decade, 630 was close to exhaustion due to the 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 Ten-digit dialing is a telephone dialing procedure in the countries and territories of the North American Numbering Plan (NANP). It is the practice of including the area code of a telephone number when Dialling (telephony), dialing to initiate a t ...

mandatory in the area. The Illinois side of the Chicago area–

312 __NOTOC__ Year 312 (Roman numerals, CCCXII) was a leap year starting on Tuesday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Constantinus and Licinianus (or, less frequently, year 1065 ''Ab urbe co ...

/ 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.

Service area

* Addison *

* Bartlett * Batavia * Bensenville * Big Rock * Bloomingdale * Bolingbrook (majority) * Boulder Hill *

Bristol Bristol () is a City status in the United Kingdom, cathedral city, unitary authority area and ceremonial county in South West England, the most populous city in the region. Built around the River Avon, Bristol, River Avon, it is bordered by t ...

* Burr Ridge * Campton Hills * Carol Stream *

Clarendon Hills Clarendon Hills is a village in DuPage County, Illinois, United States. The population was 8,702 at the 2020 census. It is a south-west suburb of Chicago. History The area that is now Clarendon Hills was a wide, rolling prairie bordering the eas ...

* Darien * Downers Grove * Elburn *

(partial) *

Elk Grove Village Elk Grove Village is a village in Cook and DuPage counties in the U.S. state of Illinois. Per the 2020 census, the population was 32,812. Located northwest of Chicago along the Golden Corridor, the Village of Elk Grove Village was incorpor ...

(partial) * Elmhurst *

Geneva Geneva ( , ; ) ; ; . is the List of cities in Switzerland, second-most populous city in Switzerland and the most populous in French-speaking Romandy. Situated in the southwest of the country, where the Rhône exits Lake Geneva, it is the ca ...

* Glendale Heights * Glen Ellyn * Hanover Park * Hinsdale * Itasca * Kaneville * Keeneyville * La Fox * Lemont * Lily Lake * Lisle *

Little Rock Little Rock is the List of capitals in the United States, capital and List of municipalities in Arkansas, most populous city of the U.S. state of Arkansas. The city's population was 202,591 as of the 2020 census. The six-county Central Arkan ...

* Lombard * Maple Park (eastern half) * Medinah * Millbrook * Montgomery * Mooseheart * Naperville * North Aurora * Oak Brook * Oakbrook Terrace * Oswego * Plainfield (partial) * Plano * Plattville * Prestbury *

Romeoville Romeoville is a village in Will County, Illinois, United States. The village is located southwest of Chicago on the Gateway Wetlands, directly west of the Des Plaines River. Per the 2020 census, the population was 39,863. It is located in the s ...

(partial) * Roselle * Schaumburg (partial) * South Elgin (partial) * St. Charles * Streamwood * Sugar Grove *

Villa Park Villa Park is a association football, football stadium in Aston, Birmingham, with a seating capacity of 42,918. It has been the home of Premier League club Aston Villa F.C., Aston Villa since 1897. The ground is less than a mile from both Witt ...

Virgil Publius Vergilius Maro (; 15 October 70 BC21 September 19 BC), usually called Virgil or Vergil ( ) in English, was an ancient Rome, ancient Roman poet of the Augustan literature (ancient Rome), Augustan period. He composed three of the most fa ...

* Warrenville * Wayne * Wasco * West Chicago * Westmont * Wheaton * Willowbrook * Winfield * Wood Dale * 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

Service area

See also

References

External links