99643
ZIP 99643 is Old Harbor, Alaska, in Kodiak Island Borough; area code 907; Alaska time.
- Type
- Standard
- Time zone
- America/Anchorage
- County
- Kodiak Island
- Metro area
- none
- Population
- 162
- Coordinates
- 57.2188, -153.3297
Weather right now
Asking the National Weather Service…
Where 99643 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 99643 into a pocket calculator and turn it upside down: EhgGG — not quite a word, sorry.
- ➕ 99643 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 31, a total 799 other ZIP codes share.
- 💾In binary, the way a computer stores it:
11000010100111011 - 🏠 Its numerical neighbours: 99641 (Nunapitchuk, AK, 411 mi away) and 99644 (Ouzinkie, AK, 59 mi away). Next door on paper, a road trip in real life.
- 🔄 Backwards, 99643 becomes 34699, which is not a ZIP code at all.
- 👥 12 other ZIP codes are made of exactly the same digits (34996, 39649, 43699, 46939, 49639, 49963, …). The farthest-flung twin is 96943 in Yap, FM, 4,540 miles away.
- 🧭 Farther north than 99% of all ZIP codes, and farther west than 99%.
- 🎯2,686 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 99643 and you would come out at 57.22°S, 26.67°E — 1,608 miles from Gqeberha, South Africa, the nearest big city to that spot.
- ☀Longest day of the year: 17h 57m of daylight. Shortest: 6h 39m.
- 📏 At 15.9 square miles of land, 99643 is bigger than 34% of ZIP codes — room for about 12 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 162This ZIP162 |
|---|---|
| Households | 86This ZIP86 |
| Housing units | 153This ZIP153 |
| Median age | 34.2This ZIP34.2Alaska35.8US 38.9 |
| Median household income | $30,000This ZIP$30,000Alaska$92,788US $80,734 |
| Bachelor's degree or higher | 10.1%This ZIP10.1% |
| Mean commute | 4.9 minThis ZIP4.9 min |
| Population density | 10.2 / sq miThis ZIP10.2 / sq mi |
Business and tax activity
| Business establishments | 6This ZIP6 |
|---|---|
| Employees | 12This ZIP12 |
| Annual payroll | $937,000This ZIP$937,000 |
Land area
| Land area | 15.93 sq miThis ZIP15.93 sq mi |
|---|---|
| Water area | 6.40 sq miThis ZIP6.40 sq mi |
Other place names in 99643
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 99643
| ZIP | City | Distance |
|---|---|---|
99624 | Larsen Bay, AK | 27.0 mi |
99615 | Kodiak, AK | 32.1 mi |
99608 | Karluk, AK | 46.3 mi |
99550 | Port Lions, AK | 48.1 mi |
99619 | Kodiak, AK | 52.2 mi |
99697 | Kodiak, AK | 52.2 mi |
99644 | Ouzinkie, AK | 59.3 mi |
99613 | King Salmon, AK | 148.1 mi |
99663 | Seldovia, AK | 163.0 mi |
99603 | Homer, AK | 178.1 mi |
Find every ZIP code within 10 miles of 99643 →
Questions about this ZIP code
Where is ZIP code 99643?
99643 is in Old Harbor, Alaska, in Kodiak Island Borough. Its published point location is 57.2188, -153.3297.
What county is 99643 in?
99643 lies in Kodiak Island Borough.
What area code is 99643?
Old Harbor uses area code 907, from NANPA's telephone records.
What time zone is 99643 in?
99643 uses America/Anchorage.
How many people live in 99643?
About 162 people live in ZIP code 99643, in 86 households, at 10.2 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 99643?
$30,000 a year, against $92,788 across Alaska.
What ZIP codes are near 99643?
The closest are 99624 (27 mi), 99615 (32.1 mi), 99608 (46.3 mi), 99550 (48.1 mi) and 99619 (52.2 mi).
Is 99643 a PO Box ZIP code?
99643 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “99643 ZIP Code — Old Harbor, Alaska (Kodiak Island Borough).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99643
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/99643.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.