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Where is Area Code 331?

The 331 Area Code is located in the state of Illinois. Area Code 331 is one of the 269 three-digit telephone area codes in the USA. It covers roughly 1,441,000 unique phone numbers and 495,471 individuals near the cities of Aurora, Naperville, and Downers Grove.

Cities Located in the 331 Area Code

The most populous cities in area code 331 are: Aurora, Naperville, Downers Grove, Saint Charles, and Elmhurst.

Other cities in the 331 area code include: Lombard, Lemont, Oswego, West Chicago, Wheaton, Bartlett, Sugar Grove, Geneva, Yorkville, Elburn, Warrenville, Oak Brook, Roselle, Bensenville, Plano, and Big Rock.

About Aurora, Naperville, and Downers Grove, Illinois

Aurora, a suburb of Chicago, is a city predominantly in Kane County and DuPage County, with portions extending into Kendall and Will counties. It is located in the outer region of Greater Chicago in the U.S. state of Illinois. It is the second most populous city in the state, and the 114th most populous city in the country. The population was 197,899 at the 2010 census, and was estimated to have increased to 199,963 by July 2013. Once a mid-sized manufacturing city, Aurora has grown tremendously since the 1960s. Founded within Kane County, Aurora's city limits and population have since expanded into DuPage, Will, and Kendall counties. Between 2000 and 2003, the U.S. Census Bureau ranked Aurora as the 34th fastest growing city in the United States. From 2000 to 2009, the U.S. Census Bureau ranked the city as the 46th fastest growing city with a population of over 100,000. In 1908, Aurora officially adopted the nickname "City of Lights", because it was one of the first cities in the United States to implement an all-electric street lighting system in 1881. Aurora's historic downtown is located on the Fox River, and centered on Stolp Island. The city is divided into three regions, The West Side, located on the west side of the Fox River, The East Side, located between the eastern bank of the Fox River and the Kane/DuPage County line, and the Far East Side/Fox Valley, which is from the County Line to the city's eastern border with Naperville.The Aurora area is home to an impressive collection of architecture, including structures by Frank Lloyd Wright, Ludwig Mies van der Rohe, Bruce Goff and George Grant Elmslie. The Hollywood Casino Aurora, a dockside gaming facility with 53,000 square feet (4,900 m 2) and 1,200 gaming positions, is located on the river in downtown Aurora. Aurora is also home to a large collection of Sears Catalog Homes (over 50 homes) and Lustron all-steel homes (seven homes).

Naperville is a city in DuPage and Will counties in the U.S. state of Illinois, and a suburb of Chicago. Naperville was voted the second-best place to live in the United States by Money magazine in 2006. It was rated 1st on the list of best cities for early retirement in 2013 by Kiplinger. In a 2010 study, Naperville was named the wealthiest city in the Midwest and eleventh in the nation with a population over 75,000. It was ranked among the nation's safest cities by USAToday and Business Insider. As of the 2010 census, the city had a population of 141,853, which was estimated to have increased to 147,100 by July 2015. It is the fifth-largest city in Illinois.

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. Approximately 20 miles from the Loop, Downers Grove is a far south-western suburb of Chicago. The most recent census estimate tallied 49,715 residents in 2014.

What Time Zone is Area Code 331?

The 331 area code lies within the Central Daylight Time Zone (or CDT). The current time in Central Daylight Time is 3:00 AM on Apr 01, 2023.

Neighborhood Demographics

Statistics based on US Census data for Aurora
38 y/o
Median Age
The median age for Aurora was sourced from the US Census
$95.9K
Median Income
The median income for Aurora was sourced from the US Census
$318K
Median Home Value
The median home value for Aurora was sourced from the US Census
495K
Total Population
The total population for Aurora was sourced from the US Census

Nearby Area Codes in Illinois

7,903,000 phone numbers
3,568,454 people
Roselle, La Grange Park, Naperville

Phone Number Prefixes in the 331 Area Code

Unknown
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Unknown
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Neutral Tandem
Bartlett, IL
Verizon Wireless
Downers Grove, IL
Sprint
Elmhurst, IL
Sprint
Aurora, IL
Neutral Tandem
Naperville, IL
Sprint
Aurora, IL
Sprint
Aurora, IL
Bandwidth.com
Yorkville, IL
Sprint
Aurora, IL
Bandwidth.com
Elmhurst, IL
AT&T Mobility
Saint Charles, IL
Unknown
--
Verizon Wireless
Aurora, IL
Verizon Wireless
Naperville, IL
Verizon Wireless
Downers Grove, IL
Verizon Wireless
Naperville, IL
AT&T Mobility
Oswego, IL
T-Mobile
Wheaton, IL
AT&T Mobility
Aurora, IL
Sprint
Aurora, IL
AT&T Illinois
Elmhurst, IL
AT&T Mobility
Saint Charles, IL
Verizon Wireless
Saint Charles, IL
Sprint
Elmhurst, IL
T-Mobile
Naperville, IL
Bandwidth.com
Sugar Grove, IL
PAETEC
Saint Charles, IL
Verizon Wireless
Naperville, IL
T-Mobile
Aurora, IL
Verizon Wireless
Oak Brook, IL
T-Mobile
West Chicago, IL
Verizon Wireless
Downers Grove, IL
Bandwidth.com
Sugar Grove, IL
AT&T Mobility
Saint Charles, IL
Neutral Tandem
Wheaton, IL
Verizon Business
Naperville, IL
AT&T
Downers Grove, IL
Neutral Tandem
Yorkville, IL
T-Mobile
West Chicago, IL
West Telecom
Lombard, IL
T-Mobile
Lombard, IL
T-Mobile
Lombard, IL
Neutral Tandem
Naperville, IL
T-Mobile
Bartlett, IL
T-Mobile
Lemont, IL
Vonage Network
Naperville, IL
Bandwidth.com
Geneva, IL
Neutral Tandem
Naperville, IL
T-Mobile
Aurora, IL
Verizon Wireless
Downers Grove, IL
TELNYX
Warrenville, IL
Neutral Tandem
Lemont, IL
T-Mobile
Sugar Grove, IL
Neutral Tandem
Aurora, IL
Neutral Tandem
Aurora, IL
Emergency Networks
Naperville, IL
Neutral Tandem
Aurora, IL
Neutral Tandem
Sugar Grove, IL
Verizon Wireless
Downers Grove, IL
T-Mobile
Lemont, IL
AT&T Mobility
Aurora, IL
Neutral Tandem
Bensenville, IL
AT&T Mobility
--
Neutral Tandem
--
AT&T Mobility
--
AT&T Mobility
Saint Charles, IL
AT&T Illinois
Naperville, IL
T-Mobile
Aurora, IL
Neutral Tandem
Aurora, IL
T-Mobile
Aurora, IL
Bandwidth.com
Elburn, IL
T-Mobile
Bartlett, IL
Verizon Wireless
Naperville, IL
Neutral Tandem
Lombard, IL
T-Mobile
Bartlett, IL
Neutral Tandem
Big Rock, IL
Unknown
--
AT&T Mobility
Lombard, IL
Bandwidth.com
Lemont, IL
T-Mobile
Aurora, IL
AT&T Mobility
Oswego, IL
AT&T Illinois
Naperville, IL
Bandwidth.com
Naperville, IL
Verizon Wireless
Aurora, IL
Neutral Tandem
Elburn, IL
Fractel
Bartlett, IL
T-Mobile
Aurora, IL
Peerless Network
Oswego, IL
Verizon Wireless
Naperville, IL
Unknown
--
Level 3
Saint Charles, IL
T-Mobile
Aurora, IL
Verizon Wireless
Aurora, IL
Verizon Wireless
Saint Charles, IL
Bandwidth.com
Naperville, IL
Verizon Wireless
Aurora, IL
AT&T Mobility
Aurora, IL
First Communications
Roselle, IL
Verizon Wireless
Naperville, IL
YMax Communications
Lombard, IL
Bandwidth.com
West Chicago, IL
Level 3
Naperville, IL
Verizon Wireless
Downers Grove, IL
Unknown
--
Unknown
Naperville, IL
Bandwidth.com
Lombard, IL
Unknown
--
AT&T Mobility
Aurora, IL
AT&T Mobility
Saint Charles, IL
Fractel
Wheaton, IL
Unknown
--
Verizon Wireless
Downers Grove, IL
Sprint
Elmhurst, IL
Sprint
Aurora, IL
Sprint
Elmhurst, IL
Unknown
Aurora, IL
YMax Communications
Aurora, IL
Unknown
--
Verizon Wireless
Naperville, IL
Verizon Business
Naperville, IL
AT&T Mobility
West Chicago, IL
Neutral Tandem
Elburn, IL
T-Mobile
Aurora, IL
Unknown
--
Neutral Tandem
Wheaton, IL
Neutral Tandem
Oswego, IL
AT&T Mobility
Oswego, IL
Level 3
Geneva, IL
Neutral Tandem
Lemont, IL
Verizon Wireless
Saint Charles, IL
AT&T Mobility
Downers Grove, IL
Comcast
Downers Grove, IL
Neutral Tandem
West Chicago, IL
AT&T
Downers Grove, IL
T-Mobile
Lemont, IL
T-Mobile
Wheaton, IL
Neutral Tandem
Plano, IL
Unknown
--
Verizon Wireless
Naperville, IL
Sprint
Elmhurst, IL
AT&T Mobility
West Chicago, IL
Neutral Tandem
Warrenville, IL
Neutral Tandem
Elmhurst, IL
AT&T Mobility
Saint Charles, IL
AT&T Mobility
Downers Grove, IL
Unknown
--
Unknown
--
Unknown
--
Unknown
--
Unknown
--
Neutral Tandem
Elmhurst, IL
T-Mobile
Aurora, IL
Verizon Wireless
Downers Grove, IL
AT&T Mobility
Oswego, IL