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(203)
Enter 7-digit phone number for area code 203 or the complete 10-digit phone number

Phone Prefixes for Area Code 203

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Area code location Company / Service Provider
203-862 GREENWICH, CT VERIZON NEW YORK INC.
203-863 GREENWICH, CT VERIZON NEW YORK INC.
203-864 BRIDGEPORT, CT SPRINT SPECTRUM L.P.
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 AT&T LOCAL
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 GLOBAL CROSSING LOCAL SERVICES, INC.-CT
203-885 DANBURY, CT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT
203-886 MERIDEN, CT CHOICE ONE COMMUNICATIONS, INC. - CT
203-887 NEW HAVEN, CT SPRINT SPECTRUM L.P.
203-888 SEYMOUR, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-889 NEW HAVEN, CT GLOBAL CROSSING LOCAL SERVICES, INC.-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 GLOBAL CROSSING LOCAL SERVICES, INC.-CT
203-897 STAMFORD, CT BROOKS FIBER COMMUNICATIONS OF CONNECTICUT INC-CT
203-898 DARIEN, CT BROOKS FIBER COMMUNICATIONS OF CONNECTICUT INC-CT
203-899 NORWALK, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-900 GREENWICH, CT CABLEVISION LIGHTPATH, INC. - CT
203-901 NEW HAVEN, CT SPRINT SPECTRUM L.P.
203-902 NEW HAVEN, CT GLOBAL NAPS, INC. - CT
203-903 NEW HAVEN, CT LEVEL 3 COMMUNICATIONS, LLC - CT
203-904 NORWALK, CT SPRINT SPECTRUM L.P.
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 CHOICE ONE COMMUNICATIONS, INC. - CT
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 Area Code Information
Type of code: General Purpose Code
location: CT - US
Time zone: E
Assigned for use: Yes
Code in service: Yes
Service date: January 01, 1947
In jeopardy: No
Relief in progress: No
NPA Relief status:
Code assignable: Yes
Geographic or
non-geographic:
G
Reserved for future use: No
Planning letter(s): 388 255 217 138
Overlay code: Yes
Overlay complex: 203/475
Dialing plan Standard Permissive
Home local calls: 10D 1+10D
Foreign local calls: 10D 1+10D
Home toll calls: 1+10D NA
Foreign toll calls: 1+10D -
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