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/96840

96840

ZIP 96840 is in Honolulu, Hawaii, in Honolulu County; area code 808; Hawaii-Aleutian time. Honolulu has 41 ZIP codes in all.

Type
No street area
Time zone
Pacific/Honolulu
County
Honolulu
Metro area
Urban Honolulu, HI
Coordinates
21.3068, -157.8607

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 96813, whose figures describe that area — not this ZIP code.

☼ Live from 96840 — Honolulu, HI

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Where 96840 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 96840
  • 🔢 Type 96840 into a pocket calculator and turn it upside down: OhBgG — not quite a word, sorry.
  • ➕ As a number, 96,840 = 2 × 2 × 2 × 3 × 3 × 5 × 269. Its digits add up to 27, a total 1,806 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111101001001000
  • 🏠 Its numerical neighbours: 96839 (Honolulu, HI, 3 mi away) and 96841 (Honolulu, HI, 0 mi away).
  • 🔄 Backwards, 96840 becomes 04869, which is not a ZIP code at all.
  • 👥 43 other ZIP codes are made of exactly the same digits (04986, 06489, 06498, 09468, 09648, 09846, …). The farthest-flung twin is 09648 in APO AE, a military post office, 8,856 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther west than 99%.
  • 🎯3,680 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 96840 and you would come out at 21.31°S, 22.14°E — 333 miles from Gaborone, Botswana, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 26m of daylight. Shortest: 10h 50m.
🌙 The sky over 96840 today
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Source: USGS.

Land area

ZIP codes near 96840

ZIPCityDistance
96802 Honolulu, HI 0.1 mi
96805 Honolulu, HI 0.1 mi
96806 Honolulu, HI 0.1 mi
96807 Honolulu, HI 0.1 mi
96808 Honolulu, HI 0.1 mi
96809 Honolulu, HI 0.1 mi
96810 Honolulu, HI 0.1 mi
96812 Honolulu, HI 0.1 mi
96803 Honolulu, HI 0.2 mi
96804 Honolulu, HI 0.2 mi

Find every ZIP code within 10 miles of 96840 →

Questions about this ZIP code

Where is ZIP code 96840?

96840 is in Honolulu, Hawaii, in Honolulu County, part of the Urban Honolulu, HI metropolitan area. Its published point location is 21.3068, -157.8607.

What county is 96840 in?

96840 lies in Honolulu County.

What area code is 96840?

Honolulu uses area code 808, from NANPA's telephone records.

What time zone is 96840 in?

96840 uses Pacific/Honolulu.

What ZIP codes are near 96840?

The closest are 96802 (0.1 mi), 96805 (0.1 mi), 96806 (0.1 mi), 96807 (0.1 mi) and 96808 (0.1 mi).

Is 96840 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. “96840 ZIP Code — Honolulu, Hawaii (Honolulu County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/96840

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/96840.json

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