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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/34021

34021

ZIP 34021 is military mail, not a town: APO AA, the Armed Forces Americas routing code, which covers the Americas other than 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
America/Managua
County
none
Metro area
none
Coordinates
12.1328, -86.2504
☼ Live from 34021 — APO AA

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Where 34021 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 34021
  • 🔢 Type 34021 into a pocket calculator and turn it upside down: IZOhE — not quite a word, sorry.
  • ➕ As a number, 34,021 = 13 × 2617. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1000010011100101
  • 🏠 Its numerical neighbours: 34020 (APO AA, a military post office, 211 mi away) and 34022 (APO AA, a military post office, 149 mi away).
  • 🔄 Backwards, 34021 becomes 12043 — and that is a real ZIP code: Cobleskill, NY, 2,225 miles away.
  • 👥 68 other ZIP codes are made of exactly the same digits (01243, 01342, 01432, 02134, 02143, 02341, …). The farthest-flung twin is 04231 in Stoneham, ME, 2,400 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther east than 53%.
  • 🎯2,056 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 34021 and you would come out at 12.13°S, 93.75°E — 208 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 12h 50m of daylight. Shortest: 11h 25m.
🌙 The sky over 34021 today
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Source: USGS.

Land area

ZIP codes near 34021

ZIPCityDistance
34010 APO AA, AA 149.3 mi
34022 APO AA, AA 149.3 mi
34046 APO AA, AA 149.3 mi
34042 APO AA, AA 180.7 mi
34020 APO AA, AA 211.4 mi
34045 APO AA, AA 211.4 mi
34023 APO AA, AA 225.1 mi
34024 APO AA, AA 334.8 mi

Find every ZIP code within 10 miles of 34021 →

Questions about this ZIP code

Where is ZIP code 34021?

ZIP 34021 is military mail, not a town: APO AA, the Armed Forces Americas routing code, which covers the Americas other than 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 34021 in?

34021 belongs to no county — military ZIP codes are mail routing codes, not places.

What ZIP codes are near 34021?

The closest are 34010 (149.3 mi), 34022 (149.3 mi), 34046 (149.3 mi), 34042 (180.7 mi) and 34020 (211.4 mi).

Is 34021 a PO Box ZIP code?

34021 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. “34021 ZIP Code — APO AA, Armed Forces Americas (Military Mail).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/34021

Machine-readable version of these facts:

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