Connecticut Area Codes
4 active area codes · Bridgeport · Population around 3,674,449
Connecticut has 4 active area codes, serving cities like Bridgeport, Stamford, and New Haven. Of those, 4 are overlays covering ground another code already covers, which is why local calls there use all ten digits. The newest, 959, has been in service since August 30, 2014. Each code below links to its cities, carriers, timezone, and coverage map.
Connecticut Area Code Map
What area codes does Connecticut have?
- 203OverlayBridgeportEastern Time (ET) · 43 cities · 1,826,167
- 475OverlayBridgeportEastern Time (ET) · 43 cities · 1,826,167
- 860OverlayHartfordEastern Time (ET) · 99 cities · 1,774,109
- 959OverlayHartfordEastern Time (ET) · 99 cities · 1,774,109
More than one of these codes covers 8 of the 8 counties in Connecticut, and one county is covered by 4 of them. Each card counts the people inside that code's own boundary at the 2020 census. Adding all 4 gives 7,200,552, against the 3,605,944 the same census counts in those counties, because 3,594,608 residents fall inside more than one code.
Which cities are the largest in Connecticut?
How many phone prefixes does Connecticut use?
The area codes in Connecticut hold 1,922 assigned prefixes between them, listed under 47 distinct carrier names. A prefix is the three digits after the area code, and NANPA assigns each one to a single carrier.
Sources: City populations – U.S. Census Bureau PEP, Vintage 2024 (SUB-IP-EST2024-POP). State populations – the same program, Vintage 2025 (CO-EST2025-ALLDATA). Area-code footprint and county populations – 2020 Census Centers of Population, mapped against NANP area code boundaries. The share of each city inside a code is measured the same way, against Census place boundaries from the Census Bureau's TIGERweb service. Area code assignments – NANPA CO Code data. See our data methodology.
Frequently Asked Questions
How many area codes does Connecticut have?
Connecticut has 4 active area codes: 203, 475, 860, 959.
What is the main area code for Connecticut?
Of the 4 area codes in Connecticut, 203 is the oldest one still serving Bridgeport, its largest city. 203 has been in service since 1947.
What are the largest cities in Connecticut?
The largest cities in Connecticut include Bridgeport, Stamford, New Haven, Hartford, Waterbury.
What is the total population of Connecticut?
Connecticut has an estimated total population of 3,674,449 based on US Census PEP 2024 data.
Do I have to dial ten digits in Connecticut?
In the parts of Connecticut covered by an overlay, yes. 4 of the 4 area codes here cover ground another code already covers, and where two codes share an area, local calls need the area code as well as the seven-digit number.
Why does Connecticut have 4 area codes?
They arrived one at a time rather than all at once: 203 has been in service since 1947. 4 of the 4 are overlays, laid over a code that already covered the same ground instead of splitting its map in two. The most recent is 959, in service since August 30, 2014.
What is the newest area code in Connecticut?
959, in service since August 30, 2014.
Is my county covered by more than one area code in Connecticut?
It may be: more than one area code covers 8 of the 8 counties in Connecticut, and one county there is covered by 4 of them. The table above shows which codes reach each of the largest cities.