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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/99001

99001

ZIP 99001 is Airway Heights, Washington, in Spokane County; area code 509; Pacific time.

Type
Standard
Time zone
America/Los_Angeles
County
Spokane
Population
9,440
Coordinates
47.6387, -117.5858
☼ Live from 99001 — Airway Heights, WA

Weather right now

Asking the National Weather Service…

NEXRAD radar
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Local time: —

Where 99001 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.

★ Weird and wonderful facts about 99001
  • 🔢 Type 99001 into a pocket calculator and turn it upside down: IOOGG — not quite a word, sorry.
  • ➕ As a number, 99,001 = 7 × 14143. Its digits add up to 19, a total 2,454 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 11000001010111001
  • 🏠 Its numerical neighbours: 98953 (Zillah, WA, 150 mi away) and 99003 (Chattaroy, WA, 24 mi away).
  • 🔄 Backwards, 99001 becomes 10099, which is not a ZIP code at all.
  • 👥 8 other ZIP codes are made of exactly the same digits (00919, 09091, 10990, 19009, 19090, 90019, …). The farthest-flung twin is 09091 in APO AE, a military post office, 4,973 miles away.
  • 🧭 Farther north than 97% of all ZIP codes, and farther west than 90%.
  • 🎯1,087 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 99001 and you would come out at 47.64°S, 62.41°E — 376 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 59m of daylight. Shortest: 8h 25m.
  • 📏 At 8.0 square miles of land, 99001 is bigger than 24% of ZIP codes — room for about 6.0 Central Parks.
🌙 The sky over 99001 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population9,440This ZIP9,440
Households2,804This ZIP2,804
Housing units3,010This ZIP3,010
Median age32.6This ZIP32.6Washington38.3US 38.9
Median household income$62,518This ZIP$62,518Washington$98,141US $80,734
Median home value$346,200This ZIP$346,200Washington$564,600US $332,700
Median gross rent$1,357This ZIP$1,357Washington$1,760US $1,413
Bachelor's degree or higher14.1%This ZIP14.1%
Mean commute23.4 minThis ZIP23.4 min
Population density1,187.3 / sq miThis ZIP1,187.3 / sq mi

Business and tax activity

Business establishments171This ZIP171
Employees2,640This ZIP2,640
Annual payroll$135,081,000This ZIP$135,081,000
Tax returns filed3,410This ZIP3,410
Total adjusted gross income$175,513,000This ZIP$175,513,000

Land area

Land area7.95 sq miThis ZIP7.95 sq mi
Water area0.00 sq mi

Other place names in 99001

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 99001

ZIPCityDistance
99224 Spokane, WA 2.4 mi
99011 Fairchild Air Force Base, WA 3.2 mi
99014 Four Lakes, WA 5.4 mi
99022 Medical Lake, WA 6.3 mi
99020 Marshall, WA 6.7 mi
99201 Spokane, WA 7.1 mi
99210 Spokane, WA 7.2 mi
99211 Spokane, WA 7.2 mi
99214 Spokane, WA 7.2 mi
99215 Spokane, WA 7.2 mi

Find every ZIP code within 10 miles of 99001 →

Questions about this ZIP code

Where is ZIP code 99001?

99001 is in Airway Heights, Washington, in Spokane County, part of the Spokane-Spokane Valley, WA metropolitan area. Its published point location is 47.6387, -117.5858.

What county is 99001 in?

99001 lies in Spokane County.

What area code is 99001?

Airway Heights uses area code 509, from NANPA's telephone records.

What time zone is 99001 in?

99001 uses America/Los_Angeles.

How many people live in 99001?

About 9,440 people live in ZIP code 99001, in 2,804 households, at 1,187.3 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 99001?

$62,518 a year, against $98,141 across Washington.

What ZIP codes are near 99001?

The closest are 99224 (2.4 mi), 99011 (3.2 mi), 99014 (5.4 mi), 99022 (6.3 mi) and 99020 (6.7 mi).

Is 99001 a PO Box ZIP code?

99001 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “99001 ZIP Code — Airway Heights, Washington (Spokane County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/99001

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