The 331 Area Code (or Area Code 331) is located in the state of IL. Area Code 331 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 23.3 thousand unique phone numbers and 77.5 thousand individuals near the city of Hanover Park
Area code 331 was put into service. Area code 331 is an overlay of area code 630.
State: Illinois - IL
Major City: Elmhurst
Land area: 57,914 sq mi (149,932 km2)
Illinois - IL, The average home value is $325K.
Illinois - IL, The average resident's age is 53 y/o.
Illinois - IL, Income average is $178K.
State Population in Area Code 201: 12,801,539.
Latitude: 36° 58′ N to 42° 30′ N Longitude: 87° 30′ W to 91° 31′ W
Time zone in Area Code 201: Central 00:21:37.
Major Cities in Area Code 331: Aurora, IL>Bartlett, IL>Batavia, IL>Bensenville, IL>Bloomingdale, IL>Bolingbrook, IL>Carol Stream, IL>Darien, IL>Downers Grove, IL>Elmhurst, IL>Glen Ellyn, IL>Glendale Heights, IL>Hanover Park, IL>Lisle, IL>Lombard, IL>Naperville, IL>Roselle, IL>St. Charles, IL>Streamwood, IL>Villa Park, IL>West Chicago, IL>Westmont, IL>Wheaton, IL>Woodridge, IL