Area code 203 was first put in service January 01, 1947. Area code 203 is in USA (Connecticut). 1-800-database has 1571 records on file with a phone number in the area code of (203) and 194 comments.

The carriers providing phone numbers in 203 area code are: American Messaging (am), AT&T Local, Clec, Broadwing Communications, Brooks Fiber Communications Of Connecticut Inc-ct, Cablevision Lightpath, Cellco Partnership DBA Verizon Wireless, Choice One Communications, Comcast Phone Of Connecticut, Conversent Communications Of Connecticut, Cox Connecticut Telecom, Ctc Communications Corp., Global Crossing Local Services-ct, Global Naps, Level 3 Communications, Mcimetro Access Transmission Services LLC, Metro PCS, New Cingular Wireless PCS - DC, Omnipoint Communications, Paetec Communications, Paetec Communications - NY, Peerless Network Of Connecticut, Sbc Internet Services, Southern New England Telephone Co., Sprint Spectrum L.p., Teleport Communications America, Teleport Communications Group - NY, Usa Mobility Wireless, Verizon New York.

Counties located in area code 203 are: FAIRFIELD, NEW HAVEN, NEW LONDON, WESTCHESTER.

State: Connecticut

Largest city: Bridgeport

In service since: 01/01/1947

Timezone: Eastern

Major Cities in 203
Bridgeport, CT (144,229)
New Haven, CT (129,779)
Stamford, CT (122,643)
Waterbury, CT (110,366)
Norwalk, CT (85,603)
Danbury, CT (80,893)
Meriden, CT (60,868)
West Haven, CT (55,564)
Milford, CT (51,271)
Shelton, CT (39,559)
Zip Codes in 203
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