Area Code 203
Geographic details for North American area code 203.
Summary
Area code 203 is associated with Bridgeport, Danbury, East Haven, Meriden, Milford, Naugatuck, New Haven, North Haven, Norwalk, Shelton, Stamford, Stratford, Trumbull, Waterbury, West Haven and Westport, Connecticut, United States.
About Area Code 203
Area code 203 is a North American telephone area code associated with Bridgeport, Danbury, East Haven, Meriden, Milford, Naugatuck, New Haven, North Haven, Norwalk, Shelton, Stamford, Stratford, Trumbull, Waterbury, West Haven and Westport in Connecticut, United States. It is part of the North American Numbering Plan, which assigns three-digit codes to geographic areas across the United States, Canada and neighbouring territories.
The dataset lists 16 associated cities for area code 203, each with its own latitude and longitude. These city associations reflect the communities served by the numbering area when the data was compiled.
Area code 203 falls within Connecticut. Area codes are assigned geographically, but because of number portability a phone number does not always stay in the region it was originally issued for.
The approximate centre of this numbering area is located at latitude 41.29180 and longitude -73.12245, placing it within Connecticut. Coordinates are averaged from the associated city data and should be treated as a general reference point.
Area code 203 is one of hundreds of codes in the North American Numbering Plan. Codes are opened, split and overlaid by numbering administrators as demand changes, so city and region associations can shift over time.
Because of number portability, the current location of a phone number may differ from the area shown here. This page describes the area code assignment, not the physical location of an individual subscriber in United States.
Cities in Area Code 203
| City | State / Province | Region Code | Latitude | Longitude |
|---|---|---|---|---|
| Bridgeport | Connecticut | CT | 41.1670400 | -73.2048300 |
| Danbury | Connecticut | CT | 41.3948200 | -73.4540100 |
| East Haven | Connecticut | CT | 41.2762100 | -72.8684300 |
| Meriden | Connecticut | CT | 41.5381500 | -72.8070400 |
| Milford | Connecticut | CT | 41.2223200 | -73.0565000 |
| Naugatuck | Connecticut | CT | 41.4859300 | -73.0506600 |
| New Haven | Connecticut | CT | 41.3081500 | -72.9281600 |
| North Haven | Connecticut | CT | 41.3909300 | -72.8595400 |
| Norwalk | Connecticut | CT | 41.1176000 | -73.4079000 |
| Shelton | Connecticut | CT | 41.3164900 | -73.0931600 |
| Stamford | Connecticut | CT | 41.0534300 | -73.5387300 |
| Stratford | Connecticut | CT | 41.1845400 | -73.1331700 |
| Trumbull | Connecticut | CT | 41.2428700 | -73.2006700 |
| Waterbury | Connecticut | CT | 41.5581500 | -73.0515000 |
| West Haven | Connecticut | CT | 41.2706500 | -72.9470500 |
| Westport | Connecticut | CT | 41.1414900 | -73.3579000 |
Data Source
Area-code data is imported from Area Code Geolocation Database, a North American area-code geolocation database. GitHub.
This is a snapshot of an external open dataset, not a live telecom feed. Area-code boundaries and city associations may change over time, and number portability means an individual number may not be located where its area code suggests. Always confirm details with the relevant carrier or authority before relying on them.
Portability note: numbers can be moved between providers and regions, so an area code does not guarantee the caller's actual location.
Frequently Asked Questions
Where is area code 203 located?
Area code 203 is located in United States, within Connecticut.
Which cities use area code 203?
Area code 203 is associated with Bridgeport, Danbury, East Haven, Meriden, Milford, Naugatuck, New Haven, North Haven, Norwalk, Shelton, Stamford, Stratford, Trumbull, Waterbury, West Haven and Westport.
Is an area code tied to a physical location?
No. Area codes are assigned geographically, but number portability means a phone number can move between regions and keep its original area code. The association shown here describes the area-code assignment, not a caller's current location.