Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/00831

00831

ZIP 00831 is in St John, U.S. Virgin Islands; Atlantic time. St John has 2 ZIP codes; the other is 00830.

Type
No street area
Time zone
America/St_Thomas
County
none
Metro area
none
Coordinates
18.3273, -64.7864

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 00830, whose figures describe that area — not this ZIP code.

☼ Live from 00831 — St John, VI

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Where 00831 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 00831
  • 🔢 Type 00831 into a pocket calculator and turn it upside down: IEBOO — not quite a word, sorry.
  • ➕ As a number, 831 = 3 × 277. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100111111
  • 🏠 Its numerical neighbours: 00830 (St John, VI, 3 mi away) and 00840 (Frederiksted, VI, 42 mi away).
  • 🔄 Backwards, 00831 becomes 13800, which is not a ZIP code at all.
  • 👥 34 other ZIP codes are made of exactly the same digits (01038, 01083, 01380, 01803, 01830, 03108, …). The farthest-flung twin is 83001 in Jackson, WY, 3,168 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther east than 98%.
  • 🎯2,499 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 00831 and you would come out at 18.33°S, 115.21°E — 669 miles from Denpasar, Indonesia, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 14m of daylight. Shortest: 11h 02m.
🌙 The sky over 00831 today
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Source: USGS.

Land area

ZIP codes near 00831

ZIPCityDistance
00830 St John, VI 3.4 mi
00802 St Thomas, VI 9.2 mi
00803 St Thomas, VI 11.6 mi
00804 St Thomas, VI 11.6 mi
00805 St Thomas, VI 11.6 mi
00801 St Thomas, VI 12.4 mi
00775 Culebra, PR 34.2 mi
00841 Frederiksted, VI 38.9 mi
00851 Kingshill, VI 40.1 mi
00824 Christiansted, VI 40.8 mi

Find every ZIP code within 10 miles of 00831 →

Questions about this ZIP code

Where is ZIP code 00831?

00831 is in St John, U.S. Virgin Islands. Its published point location is 18.3273, -64.7864.

What county is 00831 in?

00831 belongs to no county — military ZIP codes are mail routing codes, not places.

What time zone is 00831 in?

00831 uses America/St_Thomas.

What ZIP codes are near 00831?

The closest are 00830 (3.4 mi), 00802 (9.2 mi), 00803 (11.6 mi), 00804 (11.6 mi) and 00805 (11.6 mi).

Is 00831 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “00831 ZIP Code — St John, U.S. Virgin Islands.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/00831

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/00831.json

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