Mount Sinai, New York

ZIP codes in Mount Sinai

Area codes for Mount Sinai

• Area code 631

  In service since November 1, 1999. Shares its area with 934. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 934

  In service since July 16, 2016. Shares its area with 631. 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

Mount Sinai is in the Eastern Time zone.

Towns near Mount Sinai

• Miller Place2.6 km (1.6 mi)
• Port Jefferson Station3.2 km (2.0 mi)
• Terryville3.6 km (2.2 mi)
• Port Jefferson4.6 km (2.9 mi)
• Sound Beach4.6 km (2.9 mi)
• Coram4.7 km (2.9 mi)
• Belle Terre5.9 km (3.7 mi)
• Selden6.9 km (4.3 mi)