What area code is 331 in Illinois?
Illinois regions with area code 331
Currently the area code 331 in the state of Illinois is used by 61 locations:
- Addison
- Aurora
- Bartlett
- Batavia
- Bensenville
- Big Rock
- Bloomingdale
- Bolingbrook
- Boulder Hill
- Burr Ridge
- Campton Hills
- Carol Stream
- Clarendon Hills
- Darien
- Downers Grove
- Elburn
- Elmhurst
- Geneva
- Glen Ellyn
- Glendale Heights
- Hanover Park
- Hinsdale
- Indian Head Park
- Itasca
- Joliet
- Kaneville
- Lemont
- Lily Lake
- Lisle
- Lombard
- Maple Park
- Millbrook
- Montgomery
- Naperville
- North Aurora
- Oak Brook
- Oakbrook Terrace
- Oswego
- Palos Park
- Plainfield
- Plano
- Prestbury
- Romeoville
- Roselle
- Sandwich
- St. Charles
- Streamwood
- Sugar Grove
- Villa Park
- Virgil
- Warrenville
- Wayne
- West Chicago
- Westmont
- Wheaton
- Willow Springs
- Willowbrook
- Winfield
- Wood Dale
- Woodridge
- Yorkville
Is the 331 prefix always used in these locations?
These Illinois locations always use this prefix, however, it may happen that some locations have multiple area codes.
As a general rule, smartphones automatically indicate the location when they receive a call. For example, if you receive a call with area code 331, the phone will indicate that it is a call coming from the state of Illinois.
How do I call from abroad to a phone in a location with the 331 area code?
To call a phone to one of the locations listed above, you must dial the USA country code (+1), the dialing code 331, and the local phone number you wish to call:
+1 331 [Telephone number]
It should be remembered that making calls from abroad to a phone with a Illinois area code will cost more than making calls within the same country. The final cost of the international call will be defined by the telephone company with which the call is made.
