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/50402

50402

ZIP 50402 is in Mason City, Iowa, in Cerro Gordo County; area code 641; Central time. Mason City has 2 ZIP codes; the other is 50401.

Type
No street area
Time zone
America/Chicago
County
Cerro Gordo
Metro area
Mason City, IA
Coordinates
43.1536, -93.2010

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 50401, whose figures describe that area — not this ZIP code.

☼ Live from 50402 — Mason City, IA

Weather right now

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Local time: —

Where 50402 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 50402
  • 🔢 Type 50402 into a pocket calculator and turn it upside down: ZOhOS — not quite a word, sorry.
  • ➕ As a number, 50,402 = 2 × 11 × 29 × 79. Its digits add up to 11, a total 714 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100010011100010
  • 🏠 Its numerical neighbours: 50401 (Mason City, IA, 0 mi away) and 50420 (Alexander, IA, 27 mi away).
  • 🔄 Backwards, 50402 becomes 20405 — and that is a real ZIP code: Washington, DC, 891 miles away.
  • 👥 27 other ZIP codes are made of exactly the same digits (02045, 02054, 02540, 04250, 05042, 05402, …). The farthest-flung twin is 02540 in Falmouth, MA, 1,154 miles away.
  • 🧭 Farther north than 84% of all ZIP codes, and farther west than 64%.
  • 🎯361 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 50402 and you would come out at 43.15°S, 86.80°E — 898 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 23m of daylight. Shortest: 8h 59m.
🌙 The sky over 50402 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments20This ZIP20
Employees537This ZIP537
Annual payroll$32,970,000This ZIP$32,970,000

Land area

ZIP codes near 50402

ZIPCityDistance
50401 Mason City, IA 0.1 mi
50467 Rock Falls, IA 7.8 mi
50464 Plymouth, IA 9.2 mi
50458 Nora Springs, IA 9.5 mi
50456 Manly, IA 9.5 mi
50428 Clear Lake, IA 9.6 mi
50469 Rockwell, IA 10.7 mi
50477 Swaledale, IA 13.1 mi
50444 Hanlontown, IA 13.5 mi
50448 Kensett, IA 13.7 mi

Find every ZIP code within 10 miles of 50402 →

Questions about this ZIP code

Where is ZIP code 50402?

50402 is in Mason City, Iowa, in Cerro Gordo County, part of the Mason City, IA micropolitan area. Its published point location is 43.1536, -93.2010.

What county is 50402 in?

50402 lies in Cerro Gordo County.

What area code is 50402?

Mason City uses area code 641, from NANPA's telephone records.

What time zone is 50402 in?

50402 uses America/Chicago.

What ZIP codes are near 50402?

The closest are 50401 (0.1 mi), 50467 (7.8 mi), 50464 (9.2 mi), 50458 (9.5 mi) and 50456 (9.5 mi).

Is 50402 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. “50402 ZIP Code — Mason City, Iowa (Cerro Gordo County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/50402

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curl https://zipcodes.pro/zip/50402.json

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