331 Area Code
331 Area Code – Get the Local Phone Number for Aurora, Illinois
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Where is 331 Area Code?
The 331 area code is located in Illinois, United States. It covers the northeastern part of Illinois and serves the western suburbs of Chicago, including cities like Aurora, Wheaton, Chicago, Bolingbrook, Naperville, and Elmhurst. This region serves 5 counties: Will, Cook, Kendall, Kane, and Dupage.
331 area code was introduced as an overlay of the 630 area code due to rapid population growth and increased phone number demand, as area code 630 was closer to running out of numbers. The area code 331, as a whole, covers 2.2 million, and the major city, Aurora, covers 197,899 residents.

Some of the nearby local area codes are 773 (Chicago, IL), 309 (Peoris, IL), 815 (Rockford, IL), 224 (Elgin, IL), 708 (Cicero, IL).
| Country | USA |
| State | Illinois |
| Major City | Aurora |
| Time Zone | Central Standard Time (UTC-6:00) or Central Daylight Saving Time (UTC-5:00) |
| Telephone Number Format | +1 (331) XXX-XXXX |
| 331 Area Code Phone Number Example | +1-331-312-4342 |
| Zip Code | 60103-60599 |
How does a 331 Area Code Phone Number Work?
The 331 area code phone number works like any other regular phone number in the United States. The NANP assigns continents into multiple area codes called Numbering Plan Areas (NPAs). Callers must dial the 10-digit number, including the 331 area code, while calling.
The 331 area code is assigned to a specific region, covering Aurora and surrounding areas. Then, it helps identify the caller’s or business’ location. The call is routed through the Public Switched Telephone Network or VoIP services to reach the receiver’s end.
For example, if you want to reach Ameritech Illinois, you can dial 1-331-321-3242, where “1” is the country code for the USA and “331” is the area code. “321” is an exchange code routing to a specific carrier, and “3242” is the subscriber number identifying the individual.
Top Level Businesses and Industries Thriving in 331 area code
The 331 area code is home to several top-level businesses and industries, including manufacturing, healthcare, retail, education, technology, financial services, automotive, logistics, and transportation. These fields help provide job opportunities and contribute to the local economy. These businesses also contribute to economic vitality, thus fostering growth, innovation, and community development.
Numerous innovative startups exist across various industries, including software, e-commerce, logistics, and supply chain management. These startups represent the dynamic spirit within the 331 area code, contributing to advancements in healthcare, sustainability, and long-term success.
Some of the major businesses in the 331 area code are as follows:
- Educational Institutions: Aurora University, Waubonsee Community College
- Healthcare: Rush-Copley Medical Center, Edward-Elmhurst Health
- Technology and IT Services: Peerless Industries, Venus Laboratories
- Other Businesses: Penske Logistics, Bill Jacobs, Volkswagen
How to Get a 331 Area Code Phone Number?
To get a phone number with the area code 331, sign up, select the USA, choose a number with the 331 area code, make the payment, and start calling and texting once your number is activated.
- Sign up for a KrispCall account and log in to access your dashboard.
- In the Select Country field, choose USA.
- Choose Illinois and Select the desired phone number with the 331 area code.
- Pick your preferred number from the list, click Buy Number, and confirm your purchase.
Why Choose 331 Area Code Phone Number?
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Powerful VoIP Features to Look for in a 331 Area Code Phone Number
Shared Number
Boost customer response by sharing your number with your team members and eliminating missed calls.
Unified Callbox
Get every detail of calls, SMS, MMS, and voicemails in a single window and access all conversations without switching apps.
Power Dialer
Manage a large volume of outbound calls by automating call dialing and improving agent efficiency & sales performance.
Auto Reply for Missed Call
Enhance caller experience by sending replies for their missed calls. Prompt them on how to reach your business even when you're unavailable.
Voicemail Greeting
Record customized, professional, and creative voicemail greetings to greet callers with automated voice messages.
Simultaneous Ringing
Use simultaneous ringing to ring multiple agents at once and ensure swift call answering & consistent customer interactions.
Bulk SMS
Convey a message to a large audience in one go. Reach your audience with important announcements instantly and efficiently.
Call Recording
Record phone calls to document the details shared in past conversations and deliver exactly what clients want.
Live Call Monitoring
Monitor live calls to ensure quality standards and gain real-time insights that drive performance and customer satisfaction.
Nearby Area Codes
Frequently Asked Questions
331 area code is a telephone code for northeastern Illinois, covering major cities like Aurora, Wheaton, Elmhurst, Bolingbrook, etc, and covers 5 counties, including Will, Cook, Kendall, Kane, and Dupage.
The 331 area code is located in the northeastern part of Illinois and serves the western suburbs of Chicago, including cities like Aurora, Naperville, Elmhurst, etc.
Anyone who wants to localize their business in Aurora or nearby Illinois can call the 331 area code phone number.
The 331 area code was started as an overlay to the 630 area code due to the increasing demand for phone numbers in Chicago suburbs in 2007 AD.
The 331 area code is located in the Central Time Zone, with UTC—6:00 during Standard Time and UTC—5:00 during Daylight Saving Time.
The zip code range for the 331 area code is 60103 to 60599. Bartlett has the lowest zip code (60103), and Fox Valley Facility is the highest (60599).
Aurora, a major city in the state of Illinois, and surrounding areas like Naperville, Bolingbrook, Wheaton, etc., have a 331 area code.
331 area code does support text messaging features, as you can send and receive text messages from any phone number registered in area code 331.
Obtain the Virtual 331 Phone Number now
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