Area Code 203 - Connecticut
Every 203 prefix with its city and carrier. Got a specific number? Search it here.
Area code 203 serves Connecticut (Eastern time zone) with 778 assigned prefixes. Major rate centers include New Haven, Stamford, Bridgeport, Norwalk, Danbury, Waterbury, Greenwich, Meriden. Received a call from a 203 number? Type the full number into the search box above to see its city, carrier, and community reports.
Prefixes in area code 203
| Prefix | City | State | Carrier |
|---|---|---|---|
| 203-816 | Trumbull | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-817 | Stamford | CT | CABLEVISION LIGHTPATH, INC. - CT |
| 203-818 | Norwalk | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
| 203-819 | Waterbury | CT | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 203-820 | Norwalk | CT | METROPCS, INC. |
| 203-821 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-822 | Norwalk | CT | AT&T - LOCAL |
| 203-823 | New Haven | CT | COMCAST IP PHONE, LLC |
| 203-824 | New Haven | CT | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 203-825 | Danbury | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-826 | Danbury | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-827 | Old Greenwich | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
| 203-828 | Seymour | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-829 | Norwalk | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-830 | Danbury | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-831 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-832 | Stamford | CT | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 203-833 | New Haven | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-834 | Wilton | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-835 | Norwalk | CT | SPOK, INC. |
| 203-836 | New Haven | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-837 | Danbury | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-838 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-839 | Norwalk | CT | SPOK, INC. |
| 203-840 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-841 | Waterbury | CT | PAETEC ITEL, LLC |
| 203-842 | Norwalk | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-843 | New Haven | CT | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 203-844 | Fairfield | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
| 203-845 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-846 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-847 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-848 | New Haven | CT | PAETEC ITEL, LLC |
| 203-849 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-850 | New Haven | CT | METROPCS, INC. |
| 203-851 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-852 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-853 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-854 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-855 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-856 | Norwalk | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-857 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-858 | Norwalk | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-859 | New Haven | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
| 203-861 | Greenwich | CT | VERIZON NEW YORK, INC. |
| 203-862 | Greenwich | CT | VERIZON NEW YORK, INC. |
| 203-863 | Greenwich | CT | VERIZON NEW YORK, INC. |
| 203-864 | Bridgeport | CT | METROPCS, INC. |
| 203-865 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-866 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-867 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-868 | New Haven | CT | AT&T - LOCAL |
| 203-869 | Greenwich | CT | VERIZON NEW YORK, INC. |
| 203-870 | Bridgeport | CT | CABLEVISION LIGHTPATH, INC. - CT |
| 203-871 | Branford | CT | TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
| 203-872 | Cheshire | CT | BANDWIDTH.COM CLEC, LLC - CT |
| 203-873 | Bridgeport | CT | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 203-874 | Milford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-875 | Darien | CT | AT&T - LOCAL |
| 203-876 | Milford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-877 | Milford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-878 | Milford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-879 | Wolcott | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-880 | Trumbull | CT | TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
| 203-881 | Seymour | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-882 | Milford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-883 | Stamford | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-884 | Guilford | CT | ONVOY, LLC - CT |
| 203-885 | Danbury | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-886 | Meriden | CT | PAETEC ITEL, LLC |
| 203-887 | New Haven | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-888 | Seymour | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-889 | New Haven | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-890 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-891 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-892 | Ansonia-Derby | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-893 | Ansonia-Derby | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-894 | Ridgefield | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-895 | Trumbull | CT | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 203-896 | Madison | CT | PEERLESS NETWORK OF CONNECTICUT, LLC - CT |
| 203-897 | Stamford | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
| 203-898 | Darien | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
| 203-899 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-900 | Greenwich | CT | CSC VOICE, LLC |
| 203-901 | New Haven | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-902 | New Haven | CT | ONVOY, LLC - CT |
| 203-903 | New Haven | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-904 | Norwalk | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-905 | Stamford | CT | TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
| 203-906 | Ansonia-Derby | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-907 | New Haven | CT | PAETEC ITEL, LLC |
| 203-908 | Bridgeport | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-909 | New Haven | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-910 | Waterbury | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-912 | Stamford | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-913 | Bridgeport | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-914 | Stamford | CT | CSC VOICE, LLC |
| 203-915 | New Haven | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-916 | Bridgeport | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-917 | Danbury | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-918 | Stamford | CT | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 203-919 | Norwalk | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-920 | New Canaan | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
| 203-921 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-922 | Huntington | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-923 | Bridgeport | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
| 203-924 | Huntington | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-925 | Huntington | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-926 | Huntington | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-927 | New Haven | CT | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT |
| 203-928 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-929 | Huntington | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-930 | Greenwich | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-931 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-932 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-933 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-934 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-935 | Meriden | CT | LEVEL 3 COMMUNICATIONS, LLC - CT |
| 203-936 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-937 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-938 | Redding | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-939 | Norwalk | CT | CSC VOICE, LLC |
| 203-940 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-941 | Seymour | CT | BANDWIDTH.COM CLEC, LLC - CT |
| 203-942 | Danbury | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-943 | Norwalk | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-944 | Huntington | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-945 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-946 | New Haven | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-947 | Danbury | CT | NEW CINGULAR WIRELESS PCS, LLC - DC |
| 203-948 | Danbury | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-949 | Wallingford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-951 | Milford | CT | TELEPORT COMMUNICATIONS AMERICA, LLC - CT |
| 203-952 | Norwalk | CT | METROPCS, INC. |
| 203-953 | Bridgeport | CT | OMNIPOINT COMMUNICATIONS, INC. - CT |
| 203-954 | Ansonia-Derby | CT | PAETEC ITEL, LLC |
| 203-955 | Fairfield | CT | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT |
| 203-956 | Norwalk | CT | CABLEVISION LIGHTPATH, INC. - CT |
| 203-957 | Norwalk | CT | CSC VOICE, LLC |
| 203-960 | Stamford | CT | CABLEVISION LIGHTPATH, INC. - CT |
| 203-961 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-962 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-963 | Norwalk | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-964 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-965 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-966 | New Canaan | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-967 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-968 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-969 | Stamford | CT | SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT |
| 203-970 | Norwalk | CT | CABLEVISION LIGHTPATH, INC. - CT |
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