Holtsville, New York

ZIP codes in Holtsville

Area codes for Holtsville

• 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

Holtsville is in the Eastern Time zone.

Towns near Holtsville

• Farmingville2.5 km (1.6 mi)
• Holbrook3 km (1.9 mi)
• North Patchogue3.7 km (2.3 mi)
• Medford5 km (3.1 mi)
• Lake Ronkonkoma6.1 km (3.8 mi)
• Selden6.2 km (3.9 mi)
• Centereach7.1 km (4.4 mi)
• Blue Point7.1 km (4.4 mi)