Telephone Area 203. Page 9.
Prefix: +1203
This prefix is distributed within the state Connecticut
The largest city in the region is New Haven
Time Zone: Eastern
Winter time: UTC-5
Summer time: UTC-4
Below on the map, there is indicated the largest city in the telephone area +1-203-...-.... Connecticut New Haven.
In the United States, telephone numbers are divided into a country code (+1), an area code (or prefix), which is three digits long, and a subscriber number (seven digits). These are just a few examples, and there are over 300 area codes in the United States. Each code can cover both large cities and less populated areas depending on population density and telephone network distribution.
Phone numbers +1-203-YYY-YYYY
| Company | District | Major City | Prefix |
|---|---|---|---|
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203940-SSSS |
| Bandwidth.com Clec | Seymour, CT | +1-203941-SSSS | |
| Sprint Spectrum L.p. | Fairfield | Danbury, CT | +1-203942-SSSS |
| Nextel Communications | Fairfield | Norwalk, CT | +1-203943-SSSS |
| Southern New England Telephone Co. | Fairfield | Huntington, CT | +1-203944-SSSS |
| Southern New England Telephone Co. | Fairfield | Norwalk, CT | +1-203945-SSSS |
| Southern New England Telephone Co. | New Haven | New Haven, CT | +1-203946-SSSS |
| New Cingular Wireless PCS - DC | Fairfield | Danbury, CT | +1-203947-SSSS |
| Nextel Communications | Fairfield | Danbury, CT | +1-203948-SSSS |
| Southern New England Telephone Co. | New Haven | Wallingford, CT | +1-203949-SSSS |
| Teleport Communications Group - New York | New Haven | Milford, CT | +1-203951-SSSS |
| Sprint Spectrum L.p. | Fairfield | Norwalk, CT | +1-203952-SSSS |
| Sprint Spectrum L.p. | Fairfield | Bridgeport, CT | +1-203953-SSSS |
| Choice One Communications | New Haven | Derby, CT | +1-203954-SSSS |
| Brooks Fiber Communications Of Connecticut Inc-ct | Fairfield | Fairfield, CT | +1-203955-SSSS |
| Cablevision Lightpath | Fairfield | Norwalk, CT | +1-203956-SSSS |
| Cablevision Lightpath | Fairfield | +1-203957-SSSS | |
| Cablevision Lightpath | Stamford, CT | +1-203960-SSSS | |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203961-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203962-SSSS |
| Southern New England Telephone Co. | Fairfield | Norwalk, CT | +1-203963-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203964-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203965-SSSS |
| Southern New England Telephone Co. | Fairfield | New Canaan, CT | +1-203966-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203967-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203968-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203969-SSSS |
| Cablevision Lightpath | +1-203970-SSSS | ||
| Cablevision Lightpath | Fairfield | Greenwich, CT | +1-203971-SSSS |
| Southern New England Telephone Co. | Fairfield | New Canaan, CT | +1-203972-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203973-SSSS |
| Teleport Communications Group - New York | New Haven | New Haven, CT | +1-203974-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203975-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203977-SSSS |
| Southern New England Telephone Co. | Fairfield | Stamford, CT | +1-203978-SSSS |
| New Cingular Wireless PCS - DC | Fairfield | Stamford, CT | +1-203979-SSSS |
| Cellco Partnership DBA Verizon Wireless | New Haven | New Haven, CT | +1-203980-SSSS |
| Sprint Spectrum L.p. | Fairfield | Norwalk, CT | +1-203981-SSSS |
| Sprint Spectrum L.p. | New Haven | Waterbury, CT | +1-203982-SSSS |
| Conversent Communications Of Connecticut | Fairfield | Greenwich, CT | +1-203983-SSSS |
| Cellco Partnership DBA Verizon Wireless | Fairfield | Norwalk, CT | +1-203984-SSSS |
| Southern New England Telephone Co. | New Haven | New Haven, CT | +1-203985-SSSS |
| Brooks Fiber Communications Of Connecticut Inc-ct | Fairfield | Old Greenwich, CT | +1-203986-SSSS |
| Level 3 Communications | Fairfield | Greenwich, CT | +1-203987-SSSS |
| New Cingular Wireless PCS - DC | New Haven | New Haven, CT | +1-203988-SSSS |
| Level 3 Communications | Fairfield | Norwalk, CT | +1-203989-SSSS |
| Brooks Fiber Communications Of Connecticut Inc-ct | Fairfield | Old Greenwich, CT | +1-203990-SSSS |
| Southern New England Telephone Co. | Fairfield | Norwalk, CT | +1-203991-SSSS |
| Cablevision Lightpath | Greenwich, CT | +1-203992-SSSS | |
| Cellco Partnership DBA Verizon Wireless | Bridgeport, CT | +1-203993-SSSS | |
| Nextel Communications | Fairfield | Danbury, CT | +1-203994-SSSS |
| Brooks Fiber Communications Of Connecticut Inc-ct | Bridgeport, CT | +1-203995-SSSS | |
| Nextel Communications | New Haven | New Haven, CT | +1-203996-SSSS |
| Omnipoint Communications | +1-203997-SSSS | ||
| Level 3 Communications | Fairfield | Stamford, CT | +1-203998-SSSS |
| Sprint Spectrum L.p. | New Haven, CT | +1-203999-SSSS |
