Serving West Suburbs (overlay) since its 2007 debut, area code 331 includes Aurora, Naperville, Joliet. The area operates on Central (CT) with roughly 1.5M+ people.
MeraTalk makes a 331 line for Illinois simple to set up, giving West Suburbs (overlay) a number they'll answer.
The reasons to choose a 331 number for Illinois all trace back to the power of a familiar local code.
Outbound reps dial West Suburbs (overlay) prospects from a number those prospects recognize. A familiar 331 caller ID gets the conversation started instead of going to voicemail.
Give your West Suburbs (overlay) customers a local number to call for help. Calls route to your support team wherever they sit, with queues, schedules, and an AI receptionist after hours.
Your team doesn't need to live in Illinois to answer a 331 number. Calls ring on laptops and mobiles anywhere, while customers see a hometown business.
Pair your 331 number with local numbers in other markets you serve. Each location keeps its own identity while every call lands in one shared MeraTalk workspace.
Area codes are added as a region's demand for phone numbers grows. Here's when each Illinois code came online — and where 331 fits in.
217 was the first of Illinois's current codes, assigned to Central Illinois and anchored by Springfield. It remains the code most residents associate with Springfield and Champaign.
As West Central Illinois grew, 309 was introduced to keep up with demand for new numbers around Peoria and Bloomington. Existing numbers kept their codes — 309 simply opened fresh inventory for the area.
As Chicago Downtown grew, 312 was introduced to keep up with demand for new numbers around Chicago Loop and River North. Existing numbers kept their codes — 312 simply opened fresh inventory for the area.
As Southern Illinois grew, 618 was introduced to keep up with demand for new numbers around East St. Louis and Belleville. Existing numbers kept their codes — 618 simply opened fresh inventory for the area.
As Northern Illinois grew, 815 was introduced to keep up with demand for new numbers around Rockford and Joliet. Existing numbers kept their codes — 815 simply opened fresh inventory for the area.
As South Suburbs grew, 708 was introduced to keep up with demand for new numbers around Cicero and Oak Lawn. Existing numbers kept their codes — 708 simply opened fresh inventory for the area.
As West Suburbs grew, 630 was introduced to keep up with demand for new numbers around Aurora and Naperville. Existing numbers kept their codes — 630 simply opened fresh inventory for the area.
As Chicago Outer Neighborhoods grew, 773 was introduced to keep up with demand for new numbers around Rogers Park and Pilsen. Existing numbers kept their codes — 773 simply opened fresh inventory for the area.
As North Suburbs grew, 847 was introduced to keep up with demand for new numbers around Evanston and Waukegan. Existing numbers kept their codes — 847 simply opened fresh inventory for the area.
As North Suburbs (overlay) grew, 224 was introduced to keep up with demand for new numbers around Waukegan and Elgin. Existing numbers kept their codes — 224 simply opened fresh inventory for the area.
As West Suburbs (overlay) grew, 331 was introduced to keep up with demand for new numbers around Aurora and Naperville. Existing numbers kept their codes — 331 simply opened fresh inventory for the area.
As Northern Illinois (overlay) grew, 779 was introduced to keep up with demand for new numbers around Rockford and DeKalb. Existing numbers kept their codes — 779 simply opened fresh inventory for the area.
As Chicago (overlay) grew, 872 was introduced to keep up with demand for new numbers around Chicago and Rosemont. Existing numbers kept their codes — 872 simply opened fresh inventory for the area.
As Central IL (overlay) grew, 447 was introduced to keep up with demand for new numbers around Champaign and Urbana. Existing numbers kept their codes — 447 simply opened fresh inventory for the area.
As South Suburbs (overlay) grew, 464 was introduced to keep up with demand for new numbers around Joliet and Bolingbrook. Existing numbers kept their codes — 464 simply opened fresh inventory for the area.
As Central IL (overlay) grew, 730 was introduced to keep up with demand for new numbers around Springfield and Bloomington. Existing numbers kept their codes — 730 simply opened fresh inventory for the area.
Make and receive calls and texts from your 331 number on desktop, mobile, or desk phone. One number for everything — no app-switching, no confusion.
Answers, screens, and routes every call to your 331 number around the clock — even when your team is offline or busy.
Every call and text to your 331 number is visible to the whole team — anyone can pick up, reply, or follow up.
Missed calls become readable transcripts delivered to your inbox.
Route West Suburbs (overlay) callers to the right person on your schedule.
Already have a 331 number? Bring it — porting is on every plan.
16 area codes covering Illinois
Area code 331 is part of the North American Numbering Plan (NANP) — the system that assigns three-digit codes to geographic regions across the US, Canada, and parts of the Caribbean. Code 331 was assigned to West Suburbs (overlay) and serves Aurora and Naperville as its primary markets.
When a call is made to a 331 number, the carrier routes it through the Central (CT) time zone switching network. This also means that when customers see a 331 number on their caller ID, they immediately associate it with West Suburbs (overlay) — before the call is even answered.
The area code on your caller ID shapes how customers in West Suburbs (overlay) decide whether to pick up or ignore your call.
Calls from a local 331 number are far more likely to be answered than calls from an out-of-state or toll-free number. Customers in West Suburbs (overlay) recognise the code and trust it as local.
A 331 number tells prospects in Illinois that you operate in their market — even if your team is fully remote or based elsewhere. First impressions happen before the first word.
With a cloud-hosted 331 number, your team can answer calls from any device, in any location. The local area code stays consistent while your team stays flexible.
Midwest listed first
Explore other Midwest area codes and find the right local number for every market you serve.
Set up your 331 number on MeraTalk, compare other US area codes, or read the public record for West Suburbs (overlay).
Read the in-depth guide to the 331 area code — coverage, history, cities, time zone and how to get a number.
On MeraTalkRun your 331 number on a full business phone system — calls, SMS, routing and an AI receptionist included.
On MeraTalkBrowse every US area code by state and find the right local number for the markets you serve.
External referenceSee the FCC's area code relief regulation (47 CFR §52.19) governing how area code 331 and every US area code is administered.
Sample placeholders — replace with verified customer outcomes after sales approval.
Same product, same support, same compliance on every plan. The AI receptionist is included from day one.
