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 |
|---|---|---|---|---|
| 203-988 | New Haven | New Haven | New Cingular Wireless Pcs, Llc - DC | Wireless |
| 203-989 | Fairfield | Norwalk | Level 3 Communications, Llc - CT | Landline |
| 203-990 | Fairfield | Old Greenwich | Brooks Fiber Communications Of Connecticut Inc-Ct | Landline |
| 203-991 | Fairfield | Norwalk | Southern New England Telco Dba Frontier Comm Of CT | Landline |
| 203-992 | Fairfield | Greenwich | Cablevision Lightpath, Inc. - CT | Landline |
| 203-993 | Fairfield | Bridgeport | Cellco Partnership Dba Verizon Wireless - CT | Wireless |
| 203-994 | Fairfield | Danbury | Sprint Spectrum L.p. | Wireless |
| 203-995 | Fairfield | Bridgeport | Brooks Fiber Communications Of Connecticut Inc-Ct | Landline |
| 203-996 | New Haven | New Haven | Sprint Spectrum L.p. | Wireless |
| 203-997 | New Haven | Derby | Omnipoint Communications, Inc. - CT | Wireless |
| 203-998 | Fairfield | Stamford | Level 3 Communications, Llc - CT | Landline |
| 203-999 | New Haven | New Haven | Sprint Spectrum L.p. | Wireless |
| 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 |
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Update Time Mar-26-2026 |
| Phone Number 203-935-8267 |
USAGE Landline |
City Meriden |
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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 |
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Update Time Mar-26-2026 |
| Phone Number 203-202-1394 |
USAGE Landline |
City Darien |
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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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