Old Greenwich, Connecticut

ZIP codes in Old Greenwich

Area codes for Old Greenwich

• 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

Old Greenwich is in the Eastern Time zone.

Towns near Old Greenwich

• Riverside1.2 km (0.7 mi)
• Cos Cob2.9 km (1.8 mi)
• Stamford3.8 km (2.4 mi)
• Indian Field3.8 km (2.4 mi)
• Greenwich6 km (3.7 mi)
• Rock Ridge6.8 km (4.2 mi)
• Noroton6.9 km (4.3 mi)
• Noroton Heights7.3 km (4.5 mi)