Connecticut Area Codes
Directory of all 4 telephone area codes assigned to Connecticut.
Connecticut phone numbers are served by 4 area codes operating in the Eastern timezone.Because an overlay is active, 10-digit dialing is mandatory across much of the state. No area codes in Connecticut are currently flagged as high-risk scams.
Most populated prefix: area code 203 (Connecticut)
All Area Codes in Connecticut
Area Code 203
Bridgeport, Stamford, New Haven, Waterbury, Norwalk, Danbury, Meriden, West Haven, Milford City (balance), Shelton
Area Code 475
Bridgeport, Stamford, New Haven, Waterbury, Norwalk, Danbury, Meriden, West Haven, Milford City (balance), Shelton
Area Code 860
Hartford, New Britain, Bristol, Middletown, Norwich, Torrington, New London, Groton, Danielson, Jewett City
Area Code 959
Hartford, New Britain, Bristol, Middletown, Norwich, Torrington, New London, Groton, Danielson, Jewett City
Major Cities Served by Connecticut Area Codes
The most populous urban centers and census places covered by Connecticut's area codes, ranked by population.
Connecticut Area Code FAQs
Quick answers to common questions about Connecticut telephone area codes.
How many area codes does Connecticut have?
Connecticut has 4 area codes: 203, 475, 860, 959.
What timezone do Connecticut area codes use?
Connecticut area codes operate in the Eastern timezone.
What is the most populated area code in Connecticut?
Area code 203 is the most populous prefix in Connecticut based on covered city population.
Which Connecticut area codes share an overlay?
203 and 475, 860 and 959. Overlay codes serve the same area, which is why 10-digit dialing is required.
Are there scam area codes in Connecticut?
Connecticut has no area codes currently flagged as high-risk scams.
About Connecticut Area Codes & Phone Dialing Rules
When placing calls within Connecticut, ten-digit dialing (area code + 7-digit telephone number) is required in overlay regions where multiple area codes serve the same geographic boundaries.