Cos Cob, Connecticut

ZIP codes in Cos Cob

Area codes for Cos Cob

• Area code 203

  In service since 1947. Shares its area with 475. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 475

  In service since December 12, 2009. Shares its area with 203. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Cos Cob is in the Eastern Time zone.

Towns near Cos Cob

• Riverside2 km (1.2 mi)
• Old Greenwich2.9 km (1.8 mi)
• Indian Field3.9 km (2.4 mi)
• Greenwich4 km (2.5 mi)
• Stamford4.7 km (2.9 mi)
• Rock Ridge5 km (3.1 mi)
• Glenville6.2 km (3.9 mi)
• Pemberwick6.5 km (4.0 mi)