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 |
|---|---|---|---|---|
| 203-628 | Fairfield | Danbury | Cablevision Lightpath, Inc. - CT | Landline |
| 203-629 | Fairfield | Greenwich | Verizon New York Inc. | Landline |
| 203-630 | New Haven | Meriden | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-631 | New Haven | Meriden | New Cingular Wireless Pcs, Llc - DC | Wireless |
| 203-632 | New Haven | Naugatuck | Choice One Communications, Inc. - CT | Landline |
| 203-633 | New Haven | Wolcott | Level 3 Communications, Llc - CT | Landline |
| 203-634 | New Haven | Meriden | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-635 | Fairfield | Stamford | Level 3 Communications, Llc - CT | Landline |
| 203-636 | Fairfield | Darien | Brooks Fiber Communications Of Connecticut Inc-Ct | Landline |
| 203-637 | Fairfield | Old Greenwich | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-638 | Fairfield | Trumbull | Paetec Communications, Llc - CT | Landline |
| 203-639 | New Haven | Meriden | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-640 | New Haven | New Haven | New Cingular Wireless Pcs, Llc - DC | Wireless |
| 203-641 | New Haven | New Haven | Cellco Partnership Dba Verizon Wireless - CT | Wireless |
| 203-642 | Fairfield | Stamford | Brooks Fiber Communications Of Connecticut Inc-Ct | Landline |
| 203-643 | New Haven | Branford | Choice One Communications, Inc. - CT | Landline |
| 203-644 | Fairfield | Norwalk | Cellco Partnership Dba Verizon Wireless - CT | Wireless |
| 203-645 | New Haven | New Haven | New Cingular Wireless Pcs, Llc - DC | Wireless |
| 203-646 | New Haven | Branford | Global Crossing Local Services, Inc.-Ct | Landline |
| 203-647 | New Haven | Milford | Paetec Communications, Llc - CT | Landline |
| 203-648 | Fairfield | Danbury | Level 3 Communications, Llc - CT | Landline |
| 203-649 | New Haven | Cheshire | Paetec Communications, Llc - CT | Landline |
| 203-650 | Fairfield | Bridgeport | Sprint Spectrum L.p. | Wireless |
| 203-651 | New Haven | Cheshire | Choice One Communications, Inc. - CT | Landline |
| 203-652 | Fairfield | Stamford | Paetec Communications, Llc - CT | Landline |
| 203-653 | Fairfield | Stamford | Paetec Communications, Llc - CT | Landline |
| 203-654 | New Haven | New Haven | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-655 | Fairfield | Darien | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-656 | Fairfield | Darien | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-657 | New Haven | New Haven | American Messaging Services, Llc | Wireless |
| 203-658 | Fairfield | Stamford | Teleport Communications America, Llc - CT | Landline |
| 203-659 | Fairfield | Fairfield | Paetec Communications, Llc - CT | Landline |
| 203-660 | Fairfield | Greenwich | Global Crossing Local Services, Inc.-Ct | Landline |
| 203-661 | Fairfield | Greenwich | Verizon New York Inc. | Landline |
| 203-662 | Fairfield | Darien | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-663 | Fairfield | Stamford | Paetec Communications, Llc - CT | Landline |
| 203-664 | Fairfield | Redding | Cablevision Lightpath, Inc. - CT | Landline |
| 203-665 | Fairfield | Stamford | Paetec Communications, Llc - CT | Landline |
| 203-667 | Fairfield | Stamford | Sprint Spectrum L.p. | Wireless |
| 203-668 | New Haven | New Haven | Sprint Spectrum L.p. | Wireless |
| 203-669 | Fairfield | Darien | Global Crossing Local Services, Inc.-Ct | Landline |
| 203-670 | New Haven | Waterbury | American Messaging Services, Llc | Wireless |
| 203-671 | New Haven | New Haven | Cellco Partnership Dba Verizon Wireless - CT | Wireless |
| 203-672 | New Haven | New Haven | Paetec Communications, Llc - CT | Landline |
| 203-673 | Fairfield | Bridgeport | At&t Local | Landline |
| 203-674 | Fairfield | Stamford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-675 | New Haven | New Haven | Sprint Spectrum L.p. | Wireless |
| 203-676 | New Haven | New Haven | Sprint Spectrum L.p. | Wireless |
| 203-677 | New Haven | Wallingford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-678 | New Haven | Wallingford | Paetec Communications, Llc - CT | Landline |
| 203-679 | New Haven | Wallingford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-680 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Wireless |
| 203-681 | Fairfield | Greenwich | Verizon New York Inc. | Landline |
| 203-682 | Fairfield | Stamford | Paetec Communications, Llc - CT | Landline |
| 203-683 | Fairfield | Bridgeport | Paetec Communications, Llc - CT | Landline |
| 203-684 | New Haven | New Haven | Metro Pcs, Inc. | Wireless |
| 203-685 | Fairfield | Bridgeport | Omnipoint Communications, Inc. - CT | Wireless |
| 203-686 | New Haven | Meriden | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-687 | New Haven | New Haven | Level 3 Communications, Llc - CT | Landline |
| 203-688 | New Haven | New Haven | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-689 | New Haven | New Haven | At&t Local | Landline |
| 203-690 | Fairfield | Bridgeport | Omnipoint Communications, Inc. - CT | Wireless |
| 203-691 | New Haven | New Haven | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-692 | Fairfield | Fairfield | Global Crossing Local Services, Inc.-Ct | Landline |
| 203-693 | New Haven | Milford | Cablevision Lightpath, Inc. - CT | Landline |
| 203-694 | New Haven | Meriden | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-695 | New Haven | Waterbury | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-696 | Fairfield | Bridgeport | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-697 | New Haven | Wallingford | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-698 | Fairfield | Old Greenwich | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| Phone Number 203-223-5069 |
USAGE Wireless |
City Stamford |
Operate Read more about who called from 2032235069 |
Update Time Mar-26-2026 |
| Phone Number 203-533-4247 |
USAGE Landline |
City Guilford |
Operate Read more about who called from 2035334247 |
Update Time Mar-26-2026 |
| Phone Number 203-935-8267 |
USAGE Landline |
City Meriden |
Operate Read more about who called from 2039358267 |
Update Time Mar-26-2026 |
| Phone Number 203-693-9975 |
USAGE Landline |
City Milford |
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Update Time Mar-26-2026 |
| Phone Number 203-596-6069 |
USAGE Landline |
City Waterbury |
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Update Time Mar-26-2026 |
| Phone Number 203-424-0354 |
USAGE Wireless |
City Danbury |
Operate Read more about who called from 2034240354 |
Update Time Mar-26-2026 |
| Phone Number 203-202-1394 |
USAGE Landline |
City Darien |
Operate Read more about who called from 2032021394 |
Update Time Mar-26-2026 |
| Phone Number 203-266-1528 |
USAGE Landline |
City Woodbury |
Operate Read more about who called from 2032661528 |
Update Time Mar-26-2026 |
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