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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/09831

09831

ZIP 09831 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
Africa/Nairobi
County
none
Metro area
none
Coordinates
-1.2833, 36.8167
☼ Live from 09831 — APO AE

Weather right now

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NEXRAD radar
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Local time: —

Where 09831 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 09831
  • 🔢 Type 09831 into a pocket calculator and turn it upside down: IEBGO — not quite a word, sorry.
  • ➕ As a number, 9,831 = 3 × 29 × 113. Its digits add up to 21, a total 2,594 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10011001100111
  • 🏠 Its numerical neighbours: 09830 (APO AE, a military post office, 2,309 mi away) and 09832 (APO AE, a military post office, 2,242 mi away). Next door on paper, a road trip in real life.
  • 🔄 Backwards, 09831 becomes 13890, which is not a ZIP code at all.
  • 👥 47 other ZIP codes are made of exactly the same digits (01938, 01983, 03819, 08319, 09138, 09183, …). The farthest-flung twin is 93108 in Santa Barbara, CA, 9,687 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther east than 99%.
  • 🎯8,576 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 09831 and you would come out at 1.28°N, 143.18°W — 1,371 miles from Papeete, French Polynesia, the nearest big city to that spot.
  • ☀Longest day of the year: 12h 12m of daylight. Shortest: 12h 03m.
🌙 The sky over 09831 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Land area

Questions about this ZIP code

Where is ZIP code 09831?

ZIP 09831 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 09831 in?

09831 belongs to no county — military ZIP codes are mail routing codes, not places.

Is 09831 a PO Box ZIP code?

09831 is a military (apo/fpo/dpo) ZIP code. A USPS routing code for military mail, not a geographic area.

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zipcodes.pro. “09831 ZIP Code — APO AE, Armed Forces Europe (Military Mail).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/09831

Machine-readable version of these facts:

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