631 Area Code

The 631 area code is a telephone area code in the North American Numbering Plan (NANP) serving most of Long Island, New York, USA. Introduced in 1999 as a split from the 516 area code, it primarily covers Suffolk County. To meet the growing demand for numbers, an overlay code 934 was added in 2016, requiring 10-digit dialing for all calls within the region.

Understanding the 631 Area Code

The 631 area code plays a vital role in telecommunications for Suffolk County, one of the fastest-growing suburban regions of New York. With both residential and business use, the 631 area code covers coastal communities, suburban towns, and rural areas.

631 Area Code Map and Location

The 631 area code map includes all of Suffolk County, New York, covering both the North and South Forks of Long Island.

Major Cities and Regions in the 631 Area Code

  • Brookhaven
  • Islip
  • Huntington
  • Smithtown
  • Babylon
  • Riverhead
  • Southampton
  • East Hampton
  • Patchogue
  • Port Jefferson

ZIP Codes Covered by the 631 Area Code

Some of the main ZIP codes served by the 631 area code include:

  • 11706 - Bay Shore, NY
  • 11743 - Huntington, NY
  • 11746 - Huntington Station, NY
  • 11772 - Patchogue, NY
  • 11901 - Riverhead, NY
  • 11937 - East Hampton, NY
  • 11733 - East Setauket, NY
  • 11787 - Smithtown, NY
  • 11702 - Babylon, NY

Time Zone

The 631 area code is located in the Eastern Time Zone (ET).

  • Standard Time: UTC -5
  • Daylight Saving Time: UTC -4

Dialing, Phone & Service Details

  • Overlay Codes: 934
  • Local dialing: 10-digit dialing required
  • Long-distance within the USA: Dial 1 + 631 + 7-digit number
  • International calls: Dial exit code + 1 + 631 + number
  • Services: Landline, mobile, VoIP, and business lines

What area code is 631? / Where's area code 631?

What area code is 631? � The 631 area code is a telephone area code assigned to Suffolk County on Long Island, New York.

Where's area code 631? � It is located in the Eastern Time Zone (ET) and serves towns and cities including Brookhaven, Huntington, Islip, Babylon, Riverhead, and East Hampton.

Frequently Asked Questions (FAQ) about 631 Area Code

What is the 631 area code?

The 631 area code covers Suffolk County on Long Island, New York, including Huntington, Islip, and Riverhead.

When was the 631 area code created?

The 631 area code was created in 1999 as a split from 516.

Where is area code 631 located?

It serves all of Suffolk County, covering towns such as Brookhaven, Smithtown, Patchogue, and East Hampton.

Does 631 have an overlay?

Yes, 631 is overlaid with 934.

What time zone is 631 in?

The 631 area code is in the Eastern Time Zone (UTC -5 / UTC -4 in DST).

631 Area Code