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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/96521

96521

ZIP 96521 is military mail, not a town: FPO AP, the Armed Forces Pacific routing code, which covers the Pacific. FPO is the Fleet Post Office, which serves Navy and Marine Corps bases and ships. Mail to it carries a unit or ship number instead of a street, at domestic US postage.

Type
Military (APO/FPO/DPO)
Time zone
Asia/Hong_Kong
County
none
Metro area
none
Coordinates
22.2783, 114.1747
☼ Live from 96521 — FPO AP

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Where 96521 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 96521
  • 🔢 Type 96521 into a pocket calculator and turn it upside down: IZSgG — not quite a word, sorry.
  • ➕ As a number, 96,521 = 263 × 367. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111100100001001
  • 🏠 Its numerical neighbours: 96520 (APO AA, a military post office, 2,030 mi away) and 96522 (FPO AA, a military post office, 0 mi away). Next door on paper, a road trip in real life.
  • 🔄 Backwards, 96521 becomes 12569 — and that is a real ZIP code: Pleasant Valley, NY, 7,985 miles away.
  • 👥 47 other ZIP codes are made of exactly the same digits (12569, 12956, 12965, 15629, 15692, 15926, …). The farthest-flung twin is 29516 in Blenheim, SC, 8,414 miles away.
  • 🧭 Farther south than 98% of all ZIP codes, and farther east than 99%.
  • 🎯7,654 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 96521 and you would come out at 22.28°S, 65.83°W — 137 miles from San Salvador de Jujuy, Argentina, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 30m of daylight. Shortest: 10h 46m.
🌙 The sky over 96521 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Land area

ZIP codes near 96521

ZIPCityDistance
96522 FPO AA, AA 0.0 mi
96447 APO AA, AA 559.5 mi

Find every ZIP code within 10 miles of 96521 →

Questions about this ZIP code

Where is ZIP code 96521?

ZIP 96521 is military mail, not a town: FPO AP, the Armed Forces Pacific routing code, which covers the Pacific. FPO is the Fleet Post Office, which serves Navy and Marine Corps bases and ships. Mail to it carries a unit or ship number instead of a street, at domestic US postage.

What county is 96521 in?

96521 belongs to no county — military ZIP codes are mail routing codes, not places.

What ZIP codes are near 96521?

The closest are 96522 (0 mi) and 96447 (559.5 mi).

Is 96521 a PO Box ZIP code?

96521 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. “96521 ZIP Code — FPO AP, Armed Forces Pacific (Military Mail).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/96521

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/96521.json

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