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Area code 363

Area code 363 Nassau, New York

Area code 363 is one of the newer area codes, added in 2023 to New York, with numbers assigned in Nassau, Cold Spring Harbor, Farmingdale. It’s 12:13 AM there now.

State
New York23 area codes in New York
Time zone
Eastern12:13 AM there now
Exchanges
383 places
Overlay
516Same area, 10-digit dialing
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Where area code 363 is

Numbers in 363 are assigned to 3 places in 3 counties: Rensselaer County, Suffolk County and Nassau County.

Nassau holds most of them: 95% of the exchanges.

  • Nassau36
  • Cold Spring Harbor1
  • Farmingdale1

Phone companies in 363

38 blocks of numbers in 363 are held by 11 phone companies. The most belong to Inteliquent (13), AT&T Mobility (6) and Bandwidth (4).

A large share, about 58%, belongs to competitive and internet phone carriers; wireless networks hold 29% and local phone and cable companies 13%.

A block’s holder is the company it was first assigned to; numbers can move to other carriers since.

History and overlays

363 went into service in 2023, added to the area of 516.

516 (since 1951) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.

38 new exchanges were assigned since 2021, the latest in July 2026.

Calling 363

It’s 12:13 AM Eastern time in 363 right now.

From elsewhere in the U.S., dial 1, 363 and the 7-digit number; inside the area, all 10 digits too.

Nearby area codes

New York has 23 area codes: 212, 315, 329, 332, 347, 363, 465, 516, 518, 585, 607, 624, 631, 646, 680, 716, 718, 838, 845, 914, 917, 929 and 934.

From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.

Map of the 363 area code

Map of the 363 area code around Nassau, Cold Spring Harbor and Farmingdale, New York.

Interactive map © OpenStreetMap contributors

Cities on the map

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Questions about 363

Where is area code 363?

In New York, covering Nassau, Cold Spring Harbor and Farmingdale across 3 counties.

What time zone is 363 in?

Eastern time. It was 12:13 AM there when this page loaded.

Is 363 an overlay?

Yes. 516 serves the same area, so dial all 10 digits for local calls.

Which phone companies have 363 numbers?

11 companies hold blocks; the most belong to Inteliquent, AT&T Mobility and Bandwidth. About 29% of blocks are wireless.

Is 363 running out of numbers?

Not on record. 38 new exchanges have been assigned since 2021.