Connecticut Area Codes: A Complete Guide

Connecticut has four area codes serving different regions, and knowing which one applies to which city can help with everything from phone identification to business setup.

Map of Connecticut Area Codes

What Are the Area Codes in Connecticut?

Connecticut is served by four area codes: 203, 860, 475, and 959.

203: Established in 1947, covering Southwestern Connecticut
860: Created in 1995 to serve Hartford, New London, and Waterbury
475: An overlay to 203, implemented in 2009}
959: Overlay for 860}

Which Cities Use Each Area Code?

Here’s how the area codes are distributed across Connecticut cities:

203 and 475 Area Codes

Stamford
Bridgeport
New Haven
Norwalk
Danbury

860 and 959 Area Codes

Hartford
New Britain
New London
Middletown
Manchester

History of Connecticut Area Codes

Originally, all of Connecticut was served by area code 203.

More historical details can be found on Wikipedia's area code page.

Why Connecticut Uses Overlay Codes

This requires 10-digit dialing, but it’s a website more user-friendly approach for residents and businesses.

Learn more about 10-digit dialing from the FCC guide.

How to Identify a Connecticut Phone Number

Receiving a call from 860 or 203? Use a phone number lookup tool.

Setting Up a Virtual Connecticut Phone Number

Need a local presence in Connecticut without being physically there?

Check out virtual number services from Bling.

Benefits of a Connecticut VoIP Phone System

VoIP systems allow you to use a Connecticut area code from anywhere in the world.

Explore VoIP systems for Connecticut that support 203, 860, 475, and 959 numbers.

Getting a Business Phone Number with a CT Area Code

Whether you're launching a new business in Stamford or Hartford, having a local number matters.

Start by selecting a provider like Bling to get a CT number for your business. Learn more at this page.

Complete Business Phone System in Connecticut

Running a business in Connecticut?

Set up a complete business phone system in Connecticut with Bling Cloud’s scalable solution.

Spam & Robocalls from CT Area Codes

If you receive a suspicious call from 475 or 959, be cautious and validate using number lookup tools.

Block scam calls using CallBlocker or read NANPA updates for changes to Connecticut codes.

Video: How Area Codes Work

Watch this YouTube video on how area codes are assigned and why overlays matter.

FAQs About Connecticut Area Codes

Q1: What is the oldest area code in Connecticut?

203 was the first and only area code until 1995.

Q2: Why were 475 and 959 created?

To handle number exhaustion in their respective regions.

Q3: Do I need to dial all 10 digits in Connecticut?

Yes, because of the overlay system, 10-digit dialing is mandatory for all local calls in Connecticut.

Q4: Can I choose my area code when getting a new number?

Yes, many VoIP and virtual providers let you pick from 203, 860, 475, or 959.

Q5: Is 959 a real area code or a scam?

However, like any area code, it can be spoofed by scammers.

We hope this guide helps you navigate Connecticut area codes better.

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