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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
203-403 RIDGEFIELD, CT TELEPORT COMMUNICATIONS AMERICA, LLC - CT
203-404 NEW HAVEN, CT BROADWING COMMUNICATIONS, LLC - CT
203-405 WOODBURY, CT PAETEC COMMUNICATIONS, LLC - CT
203-406 STAMFORD, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-407 NEW HAVEN, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-408 REDDING, CT AT&T LOCAL
203-409 OLDGRNWICH, CT TELEPORT COMMUNICATIONS AMERICA, LLC - CT
203-410 NEW HAVEN, CT SPRINT SPECTRUM L.P.
203-412 NEW HAVEN, CT AMERICAN MESSAGING SERVICES, LLC
203-413 GREENWICH, CT PAETEC COMMUNICATIONS, INC. - NY
203-414 BRIDGEPORT, CT NEW CINGULAR WIRELESS PCS, LLC - DC
203-415 NEW HAVEN, CT NEW CINGULAR WIRELESS PCS, LLC - DC
203-416 BRIDGEPORT, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-417 DANBURY, CT NEW CINGULAR WIRELESS PCS, LLC - DC
203-418 FAIRFIELD, CT TELEPORT COMMUNICATIONS AMERICA, LLC - CT
203-419 WATERBURY, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-420 MERIDEN, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-421 MADISON, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-422 GREENWICH, CT VERIZON NEW YORK INC.
203-423 WILTON, CT TELEPORT COMMUNICATIONS AMERICA, LLC - CT
203-424 DARIEN, CT SPRINT SPECTRUM L.P.
203-425 STAMFORD, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-426 NEWTOWN, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-427 MERIDEN, CT MCIMETRO ACCESS TRANSMISSION SERVICES LLC
203-428 STAMFORD, CT BROOKS FIBER COMMUNICATIONS OF CONNECTICUT INC-CT
203-429 WESTPORT, CT BROOKS FIBER COMMUNICATIONS OF CONNECTICUT INC-CT
203-430 NEW HAVEN, CT NEW CINGULAR WIRELESS PCS, LLC - DC
203-431 RIDGEFIELD, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-432 NEW HAVEN, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-433 BRANFORD, CT COMCAST PHONE OF CONNECTICUT, INC. - CT
203-434 NORWALK, CT OMNIPOINT COMMUNICATIONS, INC. - CT
203-435 NEW HAVEN, CT OMNIPOINT COMMUNICATIONS, INC. - CT
203-436 NEW HAVEN, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-437 WATERBURY, CT MCIMETRO ACCESS TRANSMISSION SERVICES LLC
203-438 RIDGEFIELD, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-439 CHESHIRE, CT COX CONNECTICUT TELECOM, LLC
203-440 MERIDEN, CT COX CONNECTICUT TELECOM, LLC
203-441 WOLCOTT, CT TELEPORT COMMUNICATIONS AMERICA, LLC - CT
203-442 NEW CANAAN, CT TELEPORT COMMUNICATIONS AMERICA, LLC - CT
203-443 MERIDEN, CT MCIMETRO ACCESS TRANSMISSION SERVICES LLC
203-444 NEW HAVEN, CT NEW CINGULAR WIRELESS PCS, LLC - DC
203-445 TRUMBULL, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-446 Ansonia / Derby, CT TELEPORT COMMUNICATIONS AMERICA, LLC - CT
203-447 HUNTINGTON, CT TELEPORT COMMUNICATIONS AMERICA, LLC - CT
203-448 DANBURY, CT BROOKS FIBER COMMUNICATIONS OF CONNECTICUT INC-CT
203-449 BRIDGEPORT, CT SPRINT SPECTRUM L.P.
203-450 BRIDGEPORT, CT CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT
203-451 WESTPORT, CT NEW CINGULAR WIRELESS PCS, LLC - DC
203-452 TRUMBULL, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
203-453 GUILFORD, CT SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF 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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