11556
ZIP 11556 is in Uniondale, New York, in Nassau County; area codes 516 and 363; Eastern time. Uniondale has 3 ZIP codes; the others are 11553 and 11555.
- Type
- Standard
- Time zone
- America/New_York
- County
- Nassau
- Metro area
- New York-Newark-Jersey City, NY-NJ
- Population
- 0
- Coordinates
- 40.7199, -73.5834
Weather right now
Asking the National Weather Service…
Where 11556 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 11556 into a pocket calculator and turn it upside down: gSSII — not quite a word, sorry.
- ➕ As a number, 11,556 = 2 × 2 × 3 × 3 × 3 × 107. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
10110100100100 - 🏠 Its numerical neighbours: 11555 (Uniondale, NY, 1 mi away) and 11557 (Hewlett, NY, 8 mi away).
- 🔄 Backwards, 11556 becomes 65511, which is not a ZIP code at all.
- 👥 11 other ZIP codes are made of exactly the same digits (11565, 15561, 15615, 16155, 16515, 51561, …). The farthest-flung twin is 56511 in Audubon, MN, 1,191 miles away.
- 🧭 Farther north than 63% of all ZIP codes, and farther east than 92%.
- 🎯1,315 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 11556 and you would come out at 40.72°S, 106.42°E — 801 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 06m of daylight. Shortest: 9h 15m.
- 📏 At 0.070 square miles of land, 11556 is bigger than 1% of ZIP codes — about 34 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 0 |
|---|---|
| Households | 0 |
| Housing units | 0 |
| Population density | 0.0 / sq mi |
Business and tax activity
| Business establishments | 157This ZIP157 |
|---|---|
| Employees | 3,287This ZIP3,287 |
| Annual payroll | $384,435,000This ZIP$384,435,000 |
Land area
| Land area | 0.07 sq miThis ZIP0.07 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 11556
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 11556
| ZIP | City | Distance |
|---|---|---|
11549 | Hempstead, NY | 0.9 mi |
11553 | Uniondale, NY | 1.1 mi |
11554 | East Meadow, NY | 1.3 mi |
11555 | Uniondale, NY | 1.4 mi |
11551 | Hempstead, NY | 2.1 mi |
11550 | Hempstead, NY | 2.4 mi |
11590 | Westbury, NY | 2.5 mi |
11514 | Carle Place, NY | 2.6 mi |
11022 | Great Neck, NY | 2.6 mi |
11026 | Great Neck, NY | 2.6 mi |
Find every ZIP code within 10 miles of 11556 →
Questions about this ZIP code
Where is ZIP code 11556?
11556 is in Uniondale, New York, in Nassau County, part of the New York-Newark-Jersey City, NY-NJ metropolitan area. Its published point location is 40.7199, -73.5834.
What county is 11556 in?
11556 lies in Nassau County.
What area code is 11556?
Uniondale uses area codes 516 and 363, from NANPA's telephone records.
What time zone is 11556 in?
11556 uses America/New_York.
How many people live in 11556?
About 0 people live in ZIP code 11556. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 11556?
The closest are 11549 (0.9 mi), 11553 (1.1 mi), 11554 (1.3 mi), 11555 (1.4 mi) and 11551 (2.1 mi).
Is 11556 a PO Box ZIP code?
11556 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “11556 ZIP Code — Uniondale, New York (Nassau County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/11556
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/11556.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.