Area code 203

Largest exchanges

• New Haven145
• Stamford97
• Bridgeport94
• Norwalk60
• Danbury54
• Waterbury52
• Greenwich27
• Meriden24
• Ansonidrby17
• Westport16

Largest carriers

• Southern New England Telco dba Frontier Comm Of Ct338
• Cellco Partnership dba Verizon Wireless - Ct61
• New Cingular Wireless Pcs, LLC - Dc52
• Omnipoint Communications, Inc. - Ct47
• Level 3 Communications, LLC - Ct41
• Paetec Itel, LLC40
• Mcimetro Access Transmission Services LLC - Ct37
• Teleport Communications America, LLC - Ct33
• Cablevision Lightpath, Inc. - Ct29
• Metropcs, Inc.25

Most reported 203 numbers

No visitor reports yet in this area code.

FCC complaints

• 203-456-82611 · 2026-10-07
• 203-263-26181 · 2026-10-06
• 203-896-54431 · 2026-10-06
• 203-780-66831 · 2026-10-05