COMPLETE GUIDE FOR 203, 860, 475, 959

Complete Guide for 203, 860, 475, 959

Complete Guide for 203, 860, 475, 959

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Connecticut Area Codes: A Complete Guide

If you're trying to understand area codes in Connecticut, you're not alone.

Map of Connecticut Area Codes

Connecticut Area Code Map

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 Northern and Eastern regions
  • Covers the same region as 203}
  • 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

To avoid splitting cities into new area codes, overlays like 475 and 959 allow new numbers in the same region.

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

Choose a provider that offers reliable VoIP and virtual number setup.

Check out virtual number services from Bling.

Benefits of a Connecticut VoIP Phone System

Perfect for startups and small businesses looking to expand into the Connecticut market.

Explore Connecticut VoIP calling tools that support 203, 860, 475, and 959 numbers.

Getting a Business Phone Number with a CT Area Code

It gives you credibility, local identity, and helps Connecticut city area codes build customer trust.

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

Spam and robocalls are a growing issue across all states including Connecticut.

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?

Some mobile carriers also offer this option during signup.

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

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


From personal calls to business communication, choosing the right area code makes a difference.

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