Area Code 203
Connecticut area code 203 has been in service since 1947. It has 569 landlines and 152 wireless prefixes (exchanges) serviced by 34 carriers. It covers 7 counties, 578 ZIP codes, and 63 cities, including New Haven, Stamford, Waterbury, Bridgeport, Danbury, Norwalk, Hamden, Meriden, and West Haven.
- State:
- Connecticut
- Time Zone:
- Eastern (4:51 am)
Area Code (203) has 721 prefixes
| Prefix | County | City | Company/Carrier | Line Type |
|---|---|---|---|---|
| (203) 202- | Fairfield | Darien | Cablevision Lightpath, Inc.... | Landline |
| (203) 204- | New Haven | Guilford | Unknown | Landline |
| (203) 205- | Fairfield | Danbury | Southern New England Teleph... | Landline |
| (203) 206- | New Haven | Waterbury | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 207- | Fairfield | Danbury | Southern New England Teleph... | Landline |
| (203) 208- | New Haven | Branford | Comcast Phone Of Connecticu... | Landline |
| (203) 209- | Fairfield | Bridgeport | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 210- | Fairfield | Wilton | Cablevision Lightpath, Inc.... | Landline |
| (203) 213- | New Haven | Meriden | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 214- | New Haven | Hamden | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 215- | New Haven | Guilford | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 216- | Fairfield | Norwalk | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 217- | New Haven | Waterbury | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 218- | Fairfield | Fairfield | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 219- | Fairfield | New Canaan | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 220- | Fairfield | Bridgeport | Cablevision Lightpath, Inc.... | Landline |
| (203) 221- | Fairfield | Saugatuck | Southern New England Teleph... | Landline |
| (203) 222- | Fairfield | Saugatuck | Southern New England Teleph... | Landline |
| (203) 223- | Fairfield | Stamford | Nextel Communications, Inc. | Cell Phone |
| (203) 224- | Fairfield | Newtown | Southern New England Teleph... | Landline |
| (203) 225- | Fairfield | Huntington | Southern New England Teleph... | Landline |
| (203) 226- | Fairfield | Saugatuck | Southern New England Teleph... | Landline |
| (203) 227- | Fairfield | Saugatuck | Southern New England Teleph... | Landline |
| (203) 228- | Fairfield | Fairfield | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 229- | Fairfield | Norwalk | Southern New England Teleph... | Landline |
| (203) 230- | New Haven | Hamden | Southern New England Teleph... | Landline |
| (203) 231- | Fairfield | Danbury | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 232- | Hartford | Hartford | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 233- | Hartford | Hartford | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 234- | New Haven | North Haven | Southern New England Teleph... | Landline |
| (203) 235- | New Haven | Meriden | Southern New England Teleph... | Landline |
| (203) 236- | New Haven | Waterbury | Southern New England Teleph... | Landline |
| (203) 237- | New Haven | Meriden | Southern New England Teleph... | Landline |
| (203) 238- | New Haven | Meriden | Southern New England Teleph... | Landline |
| (203) 239- | New Haven | North Haven | Southern New England Teleph... | Landline |
| (203) 240- | Hartford | Central | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 241- | Fairfield | Danbury | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 242- | Fairfield | Huntington | Cablevision Lightpath, Inc.... | Landline |
| (203) 243- | Fairfield | Bridgeport | Omnipoint Communications, I... | Cell Phone |
| (203) 244- | Fairfield | Ridgefield | Cablevision Lightpath, Inc.... | Landline |
| (203) 245- | New Haven | Madison | Southern New England Teleph... | Landline |
| (203) 246- | Fairfield | Norwalk | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 247- | Fairfield | Saugatuck | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 248- | New Haven | Hamden | Southern New England Teleph... | Landline |
| (203) 249- | Fairfield | Stamford | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 250- | New Haven | Cheshire | Southern New England Teleph... | Landline |
| (203) 251- | Fairfield | Stamford | Southern New England Teleph... | Landline |
| (203) 252- | Fairfield | Stamford | Cablevision Lightpath, Inc.... | Landline |
| (203) 253- | Fairfield | Stamford | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 254- | Fairfield | Fairfield | Southern New England Teleph... | Landline |
| (203) 255- | Fairfield | Fairfield | Southern New England Teleph... | Landline |
| (203) 256- | Fairfield | Fairfield | Southern New England Teleph... | Landline |
| (203) 257- | Fairfield | Bridgeport | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 258- | Fairfield | Bridgeport | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 259- | Fairfield | Fairfield | Southern New England Teleph... | Landline |
| (203) 260- | Fairfield | Bridgeport | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 261- | Fairfield | Bridgeport | Southern New England Teleph... | Landline |
| (203) 262- | New Haven | Southbury | Southern New England Teleph... | Landline |
| (203) 263- | Litchfield | Woodbury | Southern New England Teleph... | Landline |
| (203) 264- | New Haven | Southbury | Southern New England Teleph... | Landline |
| (203) 265- | New Haven | Wallingford | Southern New England Teleph... | Landline |
| (203) 266- | Litchfield | Bethlehem | Southern New England Teleph... | Landline |
| (203) 267- | New Haven | Southbury | Southern New England Teleph... | Landline |
| (203) 268- | Fairfield | Bridgeport | Southern New England Teleph... | Landline |
| (203) 269- | New Haven | Wallingford | Southern New England Teleph... | Landline |
| (203) 270- | Fairfield | Newtown | Southern New England Teleph... | Landline |
| (203) 271- | New Haven | Cheshire | Southern New England Teleph... | Landline |
| (203) 272- | New Haven | Cheshire | Southern New England Teleph... | Landline |
| (203) 273- | Fairfield | Bridgeport | Cellco Partnership Dba Veri... | Cell Phone |
| (203) 274- | Fairfield | Stamford | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 275- | Fairfield | Bridgeport | Unknown | Landline |
| (203) 276- | Fairfield | Stamford | Cablevision Lightpath, Inc.... | Landline |
| (203) 277- | New Haven | Naugatuck | Brooks Fiber Communications... | Landline |
| (203) 278- | Fairfield | Danbury | Omnipoint Communications, I... | Cell Phone |
| (203) 279- | Fairfield | Brookfield | Arch Wireless Holdings, Inc. | Cell Phone |
| (203) 280- | Fairfield | Darien | Brooks Fiber Communications... | Landline |
| (203) 281- | New Haven | Hamden | Southern New England Teleph... | Landline |
| (203) 283- | New Haven | Milford | Cablevision Lightpath, Inc.... | Landline |
| (203) 284- | New Haven | Wallingford | Southern New England Teleph... | Landline |
| (203) 285- | Hartford | East Hartford | Teleport Communications Gro... | Landline |
| (203) 286- | Fairfield | Norwalk | Conversent Communications O... | Landline |
| (203) 287- | New Haven | Hamden | Southern New England Teleph... | Landline |
| (203) 288- | New Haven | Hamden | Southern New England Teleph... | Landline |
| (203) 289- | Hartford | Bissell | Arch Wireless Holdings, Inc. | Cell Phone |
| (203) 290- | Fairfield | Bridgeport | Global Naps, Inc. - Ri | Landline |
| (203) 291- | Fairfield | Saugatuck | Southern New England Teleph... | Landline |
| (203) 292- | Fairfield | Fairfield | Cablevision Lightpath, Inc.... | Landline |
| (203) 293- | Fairfield | Saugatuck | Brooks Fiber Communications... | Landline |
| (203) 294- | New Haven | Wallingford | Southern New England Teleph... | Landline |
| (203) 295- | Fairfield | Norwalk | Brooks Fiber Communications... | Landline |
| (203) 296- | Fairfield | Bridgeport | Brooks Fiber Communications... | Landline |
| (203) 298- | New Haven | Orange | Cablevision Lightpath, Inc.... | Landline |
| (203) 299- | Fairfield | Norwalk | Southern New England Teleph... | Landline |
| (203) 300- | Fairfield | Danbury | Omnipoint Communications, I... | Cell Phone |
| (203) 301- | New Haven | Milford | Southern New England Teleph... | Landline |
| (203) 302- | Fairfield | Belle Haven | Teleport Communications Gro... | Landline |
| (203) 303- | New Haven | Wallingford | Teleport Communications Gro... | Landline |
| (203) 304- | Fairfield | Newtown | Teleport Communications Gro... | Landline |
| (203) 305- | New Haven | Guilford | New Cingular Wireless Pcs, ... | Cell Phone |
| (203) 306- | New Haven | Milford | Choice One Communications, ... | Landline |
