Zip Area Code

Uniondale, New York

Uniondale, New York, in Nassau County, has ZIP codes 11553, 11555 and 11556 and area code 516, with 363 as an overlay.

ZIP codes
11553, 11555, 11556
Area codes
516, 363
Time zone
Eastern Time
Coordinates
40.7191, -73.5956

ZIP codes in Uniondale

ZIP codePost officeCountyArea codes
11553UniondaleNassau County516, 363
11555*UniondaleNassau County516, 363
11556UniondaleNassau County516, 363

* No mapped delivery area: P.O. boxes or a single organization. Area codes are those of the nearest ZIP code area.

Area codes for Uniondale

  • Area code 516

    In service since 1951. Shares its area with 363. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 363

    In service since January 20, 2023. Shares its area with 516. 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

Uniondale is in the Eastern Time zone.

Towns near Uniondale