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.
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 |
