Connecticut Area Codes: A Complete Guide

Wondering what area code 203 or 860 means? This guide has port number to Connecticut area code all the details.

Map of Connecticut Area Codes

What Are the Area Codes in Connecticut?

Here’s a detailed look at the list of Connecticut area codes:

• 203: Original area code, covering cities like New Haven, Stamford, and Bridgeport
• 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

Overlays 475 and 959 were added in 2009 and 2014 respectively due to increased demand from mobile and VoIP numbers.

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 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

These tools help you trace the caller of any number in Connecticut.

• Whitepages
• TrueCaller
• Nomorobo

Setting Up a Virtual Connecticut Phone Number

A virtual number with a 203 or 860 area code can improve trust and conversions.

Check out CT virtual numbers from Bling.

Benefits of a Connecticut VoIP Phone System

They offer features like call recording, call forwarding, voicemail to email, and more.

Explore Connecticut VoIP calling tools 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 Connecticut business number. 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?

The 203 area code is the original, dating back to 1947.

Q2: Why were 475 and 959 created?

They are overlays for 203 and 860, respectively.

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.

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We hope this guide helps you understand and use Connecticut area codes better.