Area Code 631

New York (NY) • Stony Brook, Amagansett, Amityville, Aquebogue, Bay Shore, Bayport, Bellport, Blue Point • Eastern Time (ET)

What Stands Out

•Coverage: 1.4M people across 103 ZIP codes (primarily Suffolk County, NY).
•Overlapping area codes: 934.
•Major cities: Stony Brook, Amagansett, Amityville.

Spotlight: Coverage

Snapshot highlights for area code 631.

Income

94th

Home values

91st

Poverty rate

27th

Area Code Basics

Primary State

New York (NY)

States Served

New York (NY)

Major Cities

Stony Brook, Amagansett, Amityville, Aquebogue, Bay Shore, Bayport, Bellport, Blue Point

Time Zone(s)

Eastern Time (ET)

Est. Population

1.4M

ZIP Codes

103

Data accuracy & methodology

This report aggregates 2020–2024 ACS 5-year estimates and geographic overlays for orientation. Area-code service areas can cross ZIP/state boundaries and change over time; verify official assignments with NANPA for critical use.