Naperville, Illinois

Where Is Area Code 630?

Area code 630 is in northeastern Illinois. It serves many western suburbs of Chicago, including Naperville, Aurora, Wheaton, Downers Grove, Elmhurst, Lombard, and Oak Brook. The area code is strongly associated with DuPage County and also covers parts of Kane, Kendall, Will, and Cook counties.

Naperville is one of the best-known cities in area code 630. Other communities in the 630 service area include Glen Ellyn, Hinsdale, Westmont, Villa Park, Carol Stream, and St. Charles. The region sits west of Chicago and includes both dense suburban business districts and residential communities.

The 630 area includes major suburban landmarks and transportation corridors. These include Oakbrook Center in Oak Brook, the Morton Arboretum in Lisle, and parts of the Interstate 88 and Interstate 355 corridors. The area is part of the greater Chicago metropolitan region.

History of Area Code 630

Area code 630 was created on August 3, 1996. It was split from area code 708 as suburban Chicago added more residents, businesses, fax lines, and mobile phones. The split gave many western suburbs a separate numbering area from other Chicago suburbs.

Area code 331 was later added as an overlay to 630 on October 7, 2007. Since that date, 630 and 331 have served the same geographic area. The overlay required 10-digit dialing for local calls within the region.

Key Facts About Area Code 630

• Area code 630 is in Illinois, and Naperville is one of its best-known cities.
• Area code 630 serves the Central Time Zone.
• Area code 630 was created on August 3, 1996, in a split from area code 708.
• Area code 331 overlays area code 630, and both codes serve the same western Chicago suburban region.
• Area code 630 covers much of DuPage County and parts of Kane, Kendall, Will, and Cook counties.
• Area code 630 serves major suburban cities including Naperville, Aurora, Wheaton, Downers Grove, and Elmhurst.
• Notable places in the 630 area include the Morton Arboretum in Lisle and Oakbrook Center in Oak Brook.
• Area code 630 is a geographic area code used for local telephone service, not a toll-free code.

Frequently Asked Questions

What state is area code 630 in?

Area code 630 is in Illinois.

What major cities use area code 630?

Major cities in area code 630 include Naperville, Aurora, Wheaton, Downers Grove, Elmhurst, Lombard, and Oak Brook.

Is area code 630 a toll-free number?

No. Area code 630 is a geographic area code.