The 203 Area Code (or Area Code 203) is located in the state of CT. Area Code 203 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 2.85 million unique phone numbers and 10.3 million individuals near the city of New Haven
Area code 203 was put into service 01/01/1947. In 1995 Area code 203 was split to form area code 860. In 2009 area code 203 was overlaid with area code 475.
Ansonia, Branford, Bridgeport, Cheshire, Danbury, Darien, Derby, Fairfield, Greenwich, Guilford, Huntington, Madison, Meriden, Milford, Naugatuck, New Canaan, New Haven, Newtown, Northford, Norwalk, Old Greenwich, Redding, Ridgefield, Seymour, Southbury, Stamford, Trumbull, Wallingford, Waterbury, Westport, Wilton, Wolcott, Woodbury.
| PREFIX | COUNTY | CITY | CARRIER | TYPE |
|---|---|---|---|---|
| 203-557 | Fairfield | Westport | Cablevision Lightpath, Inc. - CT | Landline |
| 203-558 | New Haven | Waterbury | New Cingular Wireless Pcs, Llc - DC | Wireless |
| 203-559 | Fairfield | Darien | Teleport Communications America, Llc - CT | Landline |
| 203-560 | New Haven | Waterbury | New Cingular Wireless Pcs, Llc - DC | Wireless |
| 203-561 | Fairfield | Stamford | Cellco Partnership Dba Verizon Wireless - CT | Wireless |
| 203-562 | New Haven | New Haven | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-563 | Fairfield | Wilton | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-564 | Fairfield | Stamford | At&t Local | Landline |
| 203-565 | New Haven | Waterbury | Sprint Spectrum L.p. | Wireless |
| 203-566 | Fairfield | Stamford | Brooks Fiber Communications Of Connecticut Inc-Ct | Landline |
| 203-567 | Fairfield | Huntington | Paetec Communications, Llc - CT | Landline |
| 203-568 | New Haven | Waterbury | Paetec Communications, Llc - CT | Landline |
| 203-569 | Fairfield | Stamford | Cablevision Lightpath, Inc. - CT | Landline |
| 203-570 | Fairfield | Stamford | Omnipoint Communications, Inc. - CT | Wireless |
| 203-571 | Fairfield | Westport | At&t Local | Landline |
| 203-572 | Fairfield | Bridgeport | Sprint Spectrum L.p. | Wireless |
| 203-573 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-574 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-575 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-576 | Fairfield | Bridgeport | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-577 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-578 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-579 | Fairfield | Bridgeport | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-580 | Fairfield | Greenwich | Peerless Network Of Connecticut, Llc - CT | Landline |
| 203-581 | Fairfield | Bridgeport | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-582 | New Haven | New Haven | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-583 | Fairfield | Bridgeport | Level 3 Communications, Llc - CT | Landline |
| 203-584 | New Haven | New Haven | Cellco Partnership Dba Verizon Wireless - CT | Wireless |
| 203-585 | Fairfield | Stamford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-586 | Litchfield | Woodbury | Teleport Communications America, Llc - CT | Landline |
| 203-587 | Fairfield | Redding | Cablevision Lightpath, Inc. - CT | Landline |
| 203-588 | Fairfield | Stamford | Cablevision Lightpath, Inc. - CT | Landline |
| 203-589 | New Haven | New Haven | Sprint Spectrum L.p. | Wireless |
| 203-590 | Fairfield | Trumbull | Level 3 Communications, Llc - CT | Landline |
| 203-591 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-592 | New Haven | Waterbury | New Cingular Wireless Pcs, Llc - DC | Wireless |
| 203-593 | Fairfield | Norwalk | Usa Mobility Wireless, Inc. | Wireless |
| 203-594 | Fairfield | New Canaan | Cablevision Lightpath, Inc. - CT | Landline |
| 203-595 | Fairfield | Stamford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-596 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-597 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-598 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-599 | New Haven | Meriden | At&t Local | Landline |
| 203-600 | New Haven | Meriden | Metro Pcs, Inc. | Wireless |
| 203-601 | Fairfield | Trumbull | Teleport Communications America, Llc - CT | Landline |
| 203-602 | Fairfield | Stamford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-603 | New Haven | New Haven | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-604 | Fairfield | Stamford | Broadwing Communications, Llc - CT | Landline |
| 203-605 | New Haven | New Haven | Cellco Partnership Dba Verizon Wireless - CT | Wireless |
| 203-606 | New Haven | New Haven | Omnipoint Communications, Inc. - CT | Wireless |
| 203-607 | Fairfield | Stamford | Brooks Fiber Communications Of Connecticut Inc-Ct | Landline |
| 203-608 | New Haven | Meriden | Paetec Communications, Llc - CT | Landline |
| 203-609 | Fairfield | Stamford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-610 | Fairfield | Bridgeport | Conversent Communications Of Connecticut, Llc | Landline |
| 203-612 | Fairfield | Bridgeport | Global Crossing Local Services, Inc.-Ct | Landline |
| 203-613 | Fairfield | Norwalk | Sprint Spectrum L.p. | Wireless |
| 203-614 | Fairfield | Stamford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-615 | Fairfield | Bridgeport | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-616 | Fairfield | Danbury | Global Crossing Local Services, Inc.-Ct | Landline |
| 203-617 | Fairfield | Danbury | Sprint Spectrum L.p. | Wireless |
| 203-618 | Fairfield | Greenwich | Verizon New York Inc. | Landline |
| 203-619 | New Haven | New Haven | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-620 | Fairfield | Darien | Brooks Fiber Communications Of Connecticut Inc-Ct | Landline |
| 203-621 | Fairfield | Darien | Paetec Communications, Llc - CT | Landline |
| 203-622 | Fairfield | Greenwich | Verizon New York Inc. | Landline |
| 203-623 | New Haven | New Haven | Cellco Partnership Dba Verizon Wireless - CT | Wireless |
| 203-624 | New Haven | New Haven | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-625 | Fairfield | Greenwich | Verizon New York Inc. | Landline |
| 203-626 | New Haven | New Haven | At&t Local | Landline |
| 203-627 | New Haven | New Haven | Sprint Spectrum L.p. | Wireless |
| Phone Number 203-543-5229 |
USAGE Wireless |
City Bridgeport |
Operate Read more about who called from 2035435229 |
Update Time Mar-31-2025 |
| Phone Number 203-212-9222 |
USAGE Wireless |
City Bridgeport |
Operate Read more about who called from 2032129222 |
Update Time Mar-31-2025 |
| Phone Number 203-689-0259 |
USAGE Landline |
City New Haven |
Operate Read more about who called from 2036890259 |
Update Time Mar-31-2025 |
| Phone Number 203-368-2077 |
USAGE Landline |
City Bridgeport |
Operate Read more about who called from 2033682077 |
Update Time Mar-31-2025 |
| Phone Number 203-793-6162 |
USAGE Landline |
City Wallingford |
Operate Read more about who called from 2037936162 |
Update Time Mar-31-2025 |
| Phone Number 203-635-2496 |
USAGE Landline |
City Stamford |
Operate Read more about who called from 2036352496 |
Update Time Mar-31-2025 |
| Phone Number 203-300-7842 |
USAGE Wireless |
City Danbury |
Operate Read more about who called from 2033007842 |
Update Time Mar-31-2025 |
| Phone Number 203-606-6019 |
USAGE Wireless |
City New Haven |
Operate Read more about who called from 2036066019 |
Update Time Mar-31-2025 |
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