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/96721

96721

ZIP 96721 is in Hilo, Hawaii, in Hawaii County; area code 808; Hawaii-Aleutian time. Hilo has 2 ZIP codes; the other is 96720.

Type
No street area
Time zone
Pacific/Honolulu
County
Hawaii
Metro area
Hilo-Kailua, HI
Coordinates
19.7299, -155.0907

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 96720, whose figures describe that area — not this ZIP code.

☼ Live from 96721 — Hilo, HI

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 96721 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 96721
  • 🔢 Type 96721 into a pocket calculator and turn it upside down: IZLgG — not quite a word, sorry.
  • ➕ As a number, 96,721 = 311 × 311. Its digits add up to 25, a total 2,242 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111100111010001
  • 🏠 Its numerical neighbours: 96720 (Hilo, HI, 10 mi away) and 96722 (Princeville, HI, 329 mi away). Next door on paper, a road trip in real life.
  • 🔄 Backwards, 96721 becomes 12769 — and that is a real ZIP code: Phillipsport, NY, 4,849 miles away.
  • 👥 40 other ZIP codes are made of exactly the same digits (12769, 12967, 12976, 16729, 16927, 19726, …). The farthest-flung twin is 12769 in Phillipsport, NY, 4,849 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther west than 99%.
  • 🎯3,596 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 96721 and you would come out at 19.73°S, 24.91°E — 240 miles from Bulawayo, Zimbabwe, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 19m of daylight. Shortest: 10h 56m.
🌙 The sky over 96721 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments9This ZIP9
Employees26This ZIP26
Annual payroll$1,178,000This ZIP$1,178,000

Land area

ZIP codes near 96721

ZIPCityDistance
96783 Pepeekeo, HI 7.9 mi
96781 Papaikou, HI 8.8 mi
96728 Honomu, HI 9.5 mi
96749 Keaau, HI 10.0 mi
96720 Hilo, HI 10.4 mi
96760 Kurtistown, HI 12.5 mi
96710 Hakalau, HI 12.8 mi
96771 Mountain View, HI 14.8 mi
96773 Ninole, HI 17.5 mi
96780 Papaaloa, HI 18.5 mi

Find every ZIP code within 10 miles of 96721 →

Questions about this ZIP code

Where is ZIP code 96721?

96721 is in Hilo, Hawaii, in Hawaii County, part of the Hilo-Kailua, HI micropolitan area. Its published point location is 19.7299, -155.0907.

What county is 96721 in?

96721 lies in Hawaii County.

What area code is 96721?

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

What time zone is 96721 in?

96721 uses Pacific/Honolulu.

What ZIP codes are near 96721?

The closest are 96783 (7.9 mi), 96781 (8.8 mi), 96728 (9.5 mi), 96749 (10 mi) and 96720 (10.4 mi).

Is 96721 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.

Download or cite

Cite this page

zipcodes.pro. “96721 ZIP Code — Hilo, Hawaii (Hawaii County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/96721

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/96721.json

Underlying data is public domain or openly licensed — sources, vintages and licences.