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331 Area Code - Location, Time Zone. Toll Free? Scam? Who's Calling?

State Illinois
Timezone Central Time (CT)
Is Area Code 331 Toll Free? No
Major Cities Aurora, Naperville, Wheaton, Hanover Park

It can be worrying when a new area code shows up in your mobile device. Where is the call coming from? Is the call linked with scammers? Should I answer it? The area code 331 is a unique code created to serve a specific area. Below are some commonly asked questions about the area code 331...

What is 331 number and what location is it coming from?

Area code 331 is one of the telephone area codes in the North American Numbering Plan. The said area code is an overlay plan of the area code 630. Due to the large growth of the Chicago suburbs, and cellphones and mobile pagers, 630 became close to exhaustion.

The area code 331 was put on service on October 7, 2007, overlaying the 630, and is located in Illinois. The ten-digit dialing became mandatory in the area after the overlay was put on to service.

Where is area code 331?

Area code 331 is used across the North America. It is located in Illinois and covers the surrounding cities and suburbs like Aurora, Naperville, Wheaton, Hanover Park, Bolingbrook, Lombard, Glendale Heights, Oswego, Batavia, Villa Park, Lisle, Montgomery, Bensenville, Yorkville, Burr Ridge, Campton Hills, Sugar Grove, Boulder Hill, Plainfield, Oak Brook, Elburn, Romeoville, Oakbrook Terrace, Wayne, and more.

Are calls from area code 331 a scam?

Since a large number of 331 numbers are also used by customer service team, there are scammers who tend to use this number and claim that they are calling from a customer service team of a certain company.

If you happen to receive a similar call, look up on the internet the company's page and check if the number they are calling is shown on the page. If you do not find the number, immediately end the call and block the number, for it may be a spam call.

How do I block unwanted 331 calls?

If you wish to block any unwanted calls from 331, here's a simple guide on how to block a number from your mobile devices:

iPhone users;

  • Go to your recent calls
  • Click the "i" with a circle around it
  • Scroll to the bottom and click "block this caller"

Android users;

The process is quite similar to the iPhone users,

  • Go to your recent calls
  • Click "details" and then click "block number".

Are calls from 331 numbers toll free?

Calls from 331 numbers are not toll free. If you are make a call internationally or even local calls, charges may apply. The cost of the charges may vary depending on the company you contracted a cellular mobile or paging services. For more information about this matter, ask the company for clarifications about their agreements.


It is worth to repeat here that the 331 numbers are not toll free and applies charges to both international and local calls. Also, it is important to make sure the legitimacy of the number used for calling, to avoid exposing your personal information to a scammer.



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