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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/09091

09091

ZIP 09091 is military mail, not a town: APO AE, the Armed Forces Europe routing code, which covers Europe, the Middle East, Africa and Canada. APO is the Army and Air Force Post Office. Mail to it carries a unit or ship number instead of a street, at domestic US postage.

Type
Military (APO/FPO/DPO)
Time zone
Europe/Berlin
County
none
Metro area
none
Coordinates
50.2016, 9.1874
☼ Live from 09091 — APO AE

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Where 09091 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 09091
  • 🔢 Type 09091 into a pocket calculator and turn it upside down: IGOGO — not quite a word, sorry.
  • ➕ 09091 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 19, a total 2,454 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10001110000011
  • 🏠 Its numerical neighbours: 09090 (APO AE, a military post office, 26 mi away) and 09094 (APO AE, a military post office, 90 mi away).
  • 🔄 Backwards, 09091 becomes 19090 — and that is a real ZIP code: Willow Grove, PA, 3,942 miles away.
  • 👥 8 other ZIP codes are made of exactly the same digits (00919, 10990, 19009, 19090, 90019, 90091, …). The farthest-flung twin is 90019 in Los Angeles, CA, 5,793 miles away.
  • 🧭 Farther north than 99% of all ZIP codes, and farther east than 99%.
  • 🎯4,836 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 09091 and you would come out at 50.20°S, 170.81°W — 905 miles from Christchurch, New Zealand, the nearest big city to that spot.
  • ☀Longest day of the year: 16h 24m of daylight. Shortest: 8h 02m.
🌙 The sky over 09091 today
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Source: USGS.

Land area

ZIP codes near 09091

ZIPCityDistance
09165 APO AE, AE 13.0 mi
09162 APO AE, AE 15.6 mi
09089 APO AE, AE 19.4 mi
09082 APO AE, AE 19.9 mi
09008 APO AE, AE 23.1 mi
09039 APO AE, AE 23.1 mi
09060 APO AE, AE 23.1 mi
09079 APO AE, AE 23.1 mi
09213 APO AE, AE 23.1 mi
09228 APO AE, AE 23.1 mi

Find every ZIP code within 10 miles of 09091 →

Questions about this ZIP code

Where is ZIP code 09091?

ZIP 09091 is military mail, not a town: APO AE, the Armed Forces Europe routing code, which covers Europe, the Middle East, Africa and Canada. APO is the Army and Air Force Post Office. Mail to it carries a unit or ship number instead of a street, at domestic US postage.

What county is 09091 in?

09091 belongs to no county — military ZIP codes are mail routing codes, not places.

What ZIP codes are near 09091?

The closest are 09165 (13 mi), 09162 (15.6 mi), 09089 (19.4 mi), 09082 (19.9 mi) and 09008 (23.1 mi).

Is 09091 a PO Box ZIP code?

09091 is a military (apo/fpo/dpo) ZIP code. A USPS routing code for military mail, not a geographic area.

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Cite this page

zipcodes.pro. “09091 ZIP Code — APO AE, Armed Forces Europe (Military Mail).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/09091

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/09091.json

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