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 calling ...

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 Continental United States, primarily located in North America. It consists of 50 U.S. state, states, a Washington, D.C., ...

, 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 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% of all residents of Illinois live within Cook County. As of 20 ...

, 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-Lüb ...

, 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 inclu ...

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

Aurora An aurora (plural: auroras or aurorae), also commonly known as the polar lights, is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras display dynamic patterns of bri ...

. 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 growth. It sh ...

Kendall County, is included, as well. The main area code, 630 was split off from

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 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 Ten-digit dialing is a telephone dialing procedure in the countries and territories that are members of the North American Numbering Plan (NANP). It is the practice of including the area code of a telephone number when dialing to initiate a telep ...

mandatory in the area. The Illinois side of the Chicago area– 312/

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, 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 *

* Bartlett * 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 establish ...

* Big Rock * Bloomingdale * Bolingbrook * Boulder Hill *

Bristol Bristol () is a City status in the United Kingdom, city, Ceremonial counties of England, ceremonial county and unitary authority in England. Situated on the River Avon, Bristol, River Avon, it is bordered by the ceremonial counties of Glouces ...

* Burr Ridge * Campton Hills *

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 * 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 ...

* Elburn * Elmhurst *

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

Glendale Heights Glendale Heights is a village in DuPage County, Illinois, DuPage County, Illinois, United States. Per the 2020 United States Census, 2020 census, the population was 33,176. History Glendale Heights was a small farming area served by the Glen Elly ...

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 * 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 station ...

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: th ...

* 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 * W ...

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 Ac ...

* 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