Complete Guide for 203, 860, 475, 959
Complete Guide for 203, 860, 475, 959
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Connecticut Area Codes: A Complete Guide
Connecticut has multiple 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 a combination of original and overlay area codes: 203, 860, 475, and 959.
- 203: Established in 1947, covering cities like New Haven, Stamford, and Bridgeport
- 860: Created in 1995 to serve Northern and Eastern regions
- Covers the same region as 203}
- Introduced in 2014 to support growing demand}
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
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
These tools help you trace the caller of any number in Connecticut.
Setting Up a Virtual Connecticut Phone Number
Choose a provider that offers reliable VoIP and virtual number setup.
Check out CT virtual numbers 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
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
Local and toll-free numbers, combined with AI features, ensure top-tier customer experience.
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?
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?
959 is a valid area code in Connecticut used since 2014.
Whether new Connecticut area code you're in Stamford or Hartford, or managing calls from out-of-state, a local number improves credibility and reach.
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