Area code 203 covers part of Connecticutstate, covering most of Fairfield, New Haven, Litchfield counties. It was started on Jan 01, 2000. This region follows US/Eastern + Daylight Savings timezone. Other popular area codes that belong to Connecticut state include 475, 860, 959.
Date Changed | Change Details |
Jun 01, 2014 | Area code 203-299 was introduced on Mar 31, 2014 and subscribers are operational from Jun 01, 2014. |
May 02, 2014 | Area code 203-290 was introduced on Apr 02, 2014 and subscribers are operational from May 02, 2014. |
Apr 26, 2014 | Area code 203-267 was introduced on Mar 27, 2014 and subscribers are operational from Apr 26, 2014. |
Mar 31, 2014 | Area code 203-266 was introduced on Feb 28, 2014 and subscribers are operational from Mar 31, 2014. |
Nov 29, 2013 | Area code 203-262 was introduced on Oct 30, 2013 and subscribers are operational from Nov 29, 2013. |
Aug 15, 2013 | Area code 203-228 was introduced on Jun 27, 2003 and subscribers are operational from Aug 15, 2013. |
Area Code | City | County | Population | Network Operator |
203-200-0 | Hartford | New Haven | 862,477 | Bandwidth.com CLEC LLC - CT |
203-200-6 | New Haven | New Haven | 862,477 | Southern New England Telephone Company |
203-200-7 | Stamford | New Haven | 862,477 | Level 3 Communications LLC - CT |
203-200-9 | Wallingford | New Haven | 862,477 | Cellco Partnership dba Verizon Wireless - CT |
203-201 | Norwalk | New Haven | 862,477 | USA Mobility Wireless Inc |
203-202-0 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-202-8 | Stamford | Fairfield | 916,829 | Brooks Fiber Communications of Connecticut Inc - CT |
203-202-3 | Stamford | Fairfield | 916,829 | Level 3 Communications LLC - CT |
203-202-4 | Wallingford | Fairfield | 916,829 | Sprint Spectrum LP |
203-203 | 917,205 | Unavailable For Assignment | ||
203-204-8 | Hartford | New Haven | 862,477 | Bandwidth.com CLEC LLC - CT |
203-204-0 | Hartford | New Haven | 862,477 | Teleport Communications America LLC - CT |
203-204-6 | Stamford | New Haven | 862,477 | Level 3 Communications LLC - CT |
203-205-0 | Danbury | Fairfield | 916,829 | Southern New England Telephone Company |
203-205-9 | Hartford | Fairfield | 916,829 | Broadwing Communications LLC - CT |
203-206 | Middletown | New Haven | 862,477 | New Cingular Wireless PCS LLC - DC |
203-207-0 | Danbury | Fairfield | 916,829 | Southern New England Telephone Company |
203-207-1 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-208-9 | Hartford | New Haven | 862,477 | Bandwidth.com CLEC LLC - CT |
203-208-0 | Hartford | New Haven | 862,477 | Comcast Phone of Connecticut Inc - CT |
203-208-5 | New Haven | New Haven | 862,477 | SBC Internet Services Inc |
203-208-3 | Stamford | New Haven | 862,477 | Level 3 Communications LLC - CT |
203-209 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-210-8 | Hartford | Fairfield | 916,829 | Bandwidth.com CLEC LLC - CT |
203-210-0 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-211 | 459,213 | Community Support And Referral Services | ||
203-212-9 | Hartford | Fairfield | 916,829 | Bandwidth.com CLEC LLC - CT |
203-212-0 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-212-3 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-212-2 | Norwalk | Fairfield | 916,829 | MetroPCS Inc |
203-212-5 | Stamford | Fairfield | 916,829 | Brooks Fiber Communications of Connecticut Inc - CT |
203-213 | Middletown | New Haven | 862,477 | New Cingular Wireless PCS LLC - DC |
203-214 | Middletown | New Haven | 862,477 | New Cingular Wireless PCS LLC - DC |
203-215 | Middletown | New Haven | 862,477 | New Cingular Wireless PCS LLC - DC |
203-216-0 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-217 | Middletown | New Haven | 862,477 | New Cingular Wireless PCS LLC - DC |
203-218 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-219 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-220-2 | Hartford | Fairfield | 916,829 | Broadwing Communications LLC - CT |
203-220-0 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-220-6 | Stamford | Fairfield | 916,829 | Level 3 Communications LLC - CT |
203-220-8 | Willimantic | Fairfield | 916,829 | Charter FIberlink CT-CCO LLC - CT |
203-221 | Westport | Fairfield | 916,829 | Southern New England Telephone Company |
203-222 | Westport | Fairfield | 916,829 | Southern New England Telephone Company |
203-223 | Wallingford | Fairfield | 916,829 | Sprint Spectrum LP |
203-224-0 | Bloomfield | Fairfield | 916,829 | Omnipoint Communications Inc - CT |
203-224-0 | Bridgeport | Fairfield | 916,829 | Southern New England Telephone Company |
203-224-9 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-225 | Shelton | Fairfield | 916,829 | Southern New England Telephone Company |
203-226 | Westport | Fairfield | 916,829 | Southern New England Telephone Company |
203-227 | Westport | Fairfield | 916,829 | Southern New England Telephone Company |
203-228-5 | Norwalk | New Haven | 862,477 | Cablevision Lightpath Inc - CT |
203-228-0 | Wallingford | New Haven | 862,477 | Cellco Partnership dba Verizon Wireless - CT |
203-228-9 | Wallingford | New Haven | 862,477 | Sprint Spectrum LP |
203-229 | Norwalk | Fairfield | 916,829 | Southern New England Telephone Company |
203-230 | Hamden | New Haven | 862,477 | Southern New England Telephone Company |
203-231 | Wallingford | New Haven | 862,477 | Cellco Partnership dba Verizon Wireless - CT |
203-232 | Wallingford | New Haven | 862,477 | Cellco Partnership dba Verizon Wireless - CT |
203-233 | Wallingford | New Haven | 862,477 | Cellco Partnership dba Verizon Wireless - CT |
203-234 | North Haven | New Haven | 862,477 | Southern New England Telephone Company |
203-235 | Meriden | New Haven | 862,477 | Southern New England Telephone Company |
203-236 | Waterbury | New Haven | 862,477 | Southern New England Telephone Company |
203-237 | Meriden | New Haven | 862,477 | Southern New England Telephone Company |
203-238 | Meriden | New Haven | 862,477 | Southern New England Telephone Company |
203-239 | North Haven | New Haven | 862,477 | Southern New England Telephone Company |
203-240 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-241 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-242-7 | Hartford | Fairfield | 916,829 | Bandwidth.com CLEC LLC - CT |
203-242-8 | Hartford | Fairfield | 916,829 | Peerless Network of Connecticut LLC - CT |
203-242-6 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-242-0 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-242-0 | Stamford | Fairfield | 916,829 | Level 3 Communications LLC - CT |
203-243 | Bloomfield | Fairfield | 916,829 | Omnipoint Communications Inc - CT |
203-244-8 | Hartford | Fairfield | 916,829 | Bandwidth.com CLEC LLC - CT |
203-244-9 | Hartford | Fairfield | 916,829 | Broadwing Communications LLC - CT |
203-244-5 | Hartford | Fairfield | 916,829 | Comcast Phone of Connecticut Inc - CT |
203-244-6 | Hartford | Fairfield | 916,829 | MCImetro Access Transmission Services LLC |
203-244-0 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-244-2 | Stamford | Fairfield | 916,829 | CTC Communications Corporation - CT |
203-245 | Madison | New Haven | 862,477 | Southern New England Telephone Company |
203-246 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-247 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-248 | Hamden | New Haven | 862,477 | Southern New England Telephone Company |
203-249 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-250 | Cheshire | New Haven | 862,477 | Southern New England Telephone Company |
203-251 | Stamford | Fairfield | 916,829 | Southern New England Telephone Company |
203-252-8 | Bloomfield | Fairfield | 916,829 | Omnipoint Communications Inc - CT |
203-252-9 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-252-2 | New Haven | Fairfield | 916,829 | Conversent Communications of Connecticut LLC - CT |
203-252-0 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-253 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-254 | Fairfield | Fairfield | 916,829 | Southern New England Telephone Company |
203-255 | Fairfield | Fairfield | 916,829 | Southern New England Telephone Company |
203-256 | Fairfield | Fairfield | 916,829 | Southern New England Telephone Company |
203-257 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-258 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-259 | Fairfield | Fairfield | 916,829 | Southern New England Telephone Company |
203-260 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-261 | Trumbull | Fairfield | 916,829 | Southern New England Telephone Company |
203-262-7 | Cheshire | Litchfield | 189,927 | Teleport Communications America LLC - CT |
203-262-0 | Southbury | Litchfield | 189,927 | Southern New England Telephone Company |
203-263-0 | Southbury | Litchfield | 189,927 | Southern New England Telephone Company |
203-264 | Southbury | Litchfield | 189,927 | Southern New England Telephone Company |
203-265 | Wallingford | New Haven | 862,477 | Southern New England Telephone Company |
203-266-2 | Hartford | Litchfield | 189,927 | Comcast Phone of Connecticut Inc - CT |
203-267-9 | Hartford | Litchfield | 189,927 | Bandwidth.com CLEC LLC - CT |
203-268 | Trumbull | Fairfield | 916,829 | Southern New England Telephone Company |
203-269 | Wallingford | New Haven | 862,477 | Southern New England Telephone Company |
203-270 | Newtown | Fairfield | 916,829 | Southern New England Telephone Company |
203-271 | Cheshire | New Haven | 862,477 | Southern New England Telephone Company |
203-272 | Cheshire | New Haven | 862,477 | Southern New England Telephone Company |
203-273-0 | Wallingford | Fairfield | 916,829 | Cellco Partnership dba Verizon Wireless - CT |
203-274-0 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-274-9 | Stamford | Fairfield | 916,829 | Paetec Communications Inc - CT |
203-275-0 | Bridgeport | Fairfield | 916,829 | Southern New England Telephone Company |
203-275-8 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-276-0 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-277-0 | Stamford | Fairfield | 916,829 | Brooks Fiber Communications of Connecticut Inc - CT |
203-278-0 | Bloomfield | New Haven | 862,477 | Omnipoint Communications Inc - CT |
203-278-7 | Middletown | New Haven | 862,477 | New Cingular Wireless PCS LLC - DC |
203-279 | Bridgeport | Fairfield | 916,829 | USA Mobility Wireless Inc |
203-280-1 | Hartford | Fairfield | 916,829 | Broadwing Communications LLC - CT |
203-281 | Hamden | New Haven | 862,477 | Southern New England Telephone Company |
203-282 | Stamford | Fairfield | 916,829 | USA Mobility Wireless Inc |
203-283-8 | Hartford | New Haven | 862,477 | MCImetro Access Transmission Services LLC |
203-284 | Wallingford | New Haven | 862,477 | Southern New England Telephone Company |
203-285-9 | Bloomfield | New Haven | 862,477 | Omnipoint Communications Inc - CT |
203-285-5 | Middletown | New Haven | 862,477 | New Cingular Wireless PCS LLC - DC |
203-286-9 | Bloomfield | Fairfield | 916,829 | Omnipoint Communications Inc - CT |
203-286-0 | New Haven | Fairfield | 916,829 | Conversent Communications of Connecticut LLC - CT |
203-287 | Hamden | New Haven | 862,477 | Southern New England Telephone Company |
203-288 | Hamden | New Haven | 862,477 | Southern New England Telephone Company |
203-289 | Danbury | Fairfield | 916,829 | USA Mobility Wireless Inc |
203-290-0 | Bloomfield | Fairfield | 916,829 | Omnipoint Communications Inc - CT |
203-290-4 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-291-9 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-292-1 | Hartford | Fairfield | 916,829 | Bandwidth.com CLEC LLC - CT |
203-293-8 | Hartford | Fairfield | 916,829 | Bandwidth.com CLEC LLC - CT |
203-293-0 | Stamford | Fairfield | 916,829 | Brooks Fiber Communications of Connecticut Inc - CT |
203-294 | Wallingford | New Haven | 862,477 | Southern New England Telephone Company |
203-295-4 | Hartford | Fairfield | 916,829 | Bandwidth.com CLEC LLC - CT |
203-295-7 | Stamford | Fairfield | 916,829 | Level 3 Communications LLC - CT |
203-296-0 | Bloomfield | Fairfield | 916,829 | Omnipoint Communications Inc - CT |
203-296-9 | Norwalk | Fairfield | 916,829 | Cablevision Lightpath Inc - CT |
203-297-7 | Bloomfield | Fairfield | 916,829 | Omnipoint Communications Inc - CT |
203-297-5 | Middletown | Fairfield | 916,829 | New Cingular Wireless PCS LLC - DC |
203-298-2 | Bloomfield | New Haven | 862,477 | Omnipoint Communications Inc - CT |
203-299-2 | Hartford | Fairfield | 916,829 | Bandwidth.com CLEC LLC - CT |
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