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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/51556

51556

ZIP 51556 is Modale, Iowa, in Harrison County; area code 712; Central time.

Type
Standard
Time zone
America/Chicago
County
Harrison
Metro area
Omaha, NE-IA
Population
266
Coordinates
41.6429, -96.0401
☼ Live from 51556 — Modale, IA

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Local time: —

Where 51556 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 51556
  • 🔢 Type 51556 into a pocket calculator and turn it upside down: gSSIS — not quite a word, sorry.
  • ➕ As a number, 51,556 = 2 × 2 × 12889. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100100101100100
  • 🏠 Its numerical neighbours: 51555 (Missouri Valley, IA, 9 mi away) and 51557 (Mondamin, IA, 7 mi away).
  • 🔄 Backwards, 51556 becomes 65515, which is not a ZIP code at all.
  • 👥 9 other ZIP codes are made of exactly the same digits (15565, 15655, 51565, 55165, 55615, 56155, …). The farthest-flung twin is 15565 in West Salisbury, PA, 895 miles away.
  • 🧭 Farther north than 72% of all ZIP codes, and farther west than 71%.
  • 🎯183 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 51556 and you would come out at 41.64°S, 83.96°E — 850 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 12m of daylight. Shortest: 9h 09m.
  • 📏 At 49.5 square miles of land, 51556 is bigger than 59% of ZIP codes — room for about 38 Central Parks.
🌙 The sky over 51556 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population266This ZIP266
Households126This ZIP126
Housing units140This ZIP140
Median age58.4This ZIP58.4Iowa38.6US 38.9
Median household income$60,556This ZIP$60,556Iowa$75,059US $80,734
Median home value$139,600This ZIP$139,600Iowa$208,000US $332,700
Median gross rent$1,125This ZIP$1,125Iowa$972US $1,413
Bachelor's degree or higher9.7%This ZIP9.7%
Mean commute20.6 minThis ZIP20.6 min
Population density5.4 / sq miThis ZIP5.4 / sq mi

Business and tax activity

Business establishments7This ZIP7
Employees31This ZIP31
Annual payroll$2,704,000This ZIP$2,704,000
Tax returns filed200This ZIP200
Total adjusted gross income$14,293,000This ZIP$14,293,000

Land area

Land area49.47 sq miThis ZIP49.47 sq mi
Water area1.33 sq miThis ZIP1.33 sq mi

Other place names in 51556

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

ZIP codes near 51556

ZIPCityDistance
51557 Mondamin, IA 6.5 mi
51555 Missouri Valley, IA 8.6 mi
51550 Magnolia, IA 9.2 mi
68008 Blair, NE 9.7 mi
68009 Blair, NE 10.3 mi
68029 Herman, NE 12.1 mi
68023 Fort Calhoun, NE 12.4 mi
51564 Pisgah, IA 13.0 mi
51546 Logan, IA 14.2 mi
51545 Little Sioux, IA 14.4 mi

Find every ZIP code within 10 miles of 51556 →

Questions about this ZIP code

Where is ZIP code 51556?

51556 is in Modale, Iowa, in Harrison County, part of the Omaha, NE-IA metropolitan area. Its published point location is 41.6429, -96.0401.

What county is 51556 in?

51556 lies in Harrison County.

What area code is 51556?

Modale uses area code 712, from NANPA's telephone records.

What time zone is 51556 in?

51556 uses America/Chicago.

How many people live in 51556?

About 266 people live in ZIP code 51556, in 126 households, at 5.4 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 51556?

$60,556 a year, against $75,059 across Iowa.

What ZIP codes are near 51556?

The closest are 51557 (6.5 mi), 51555 (8.6 mi), 51550 (9.2 mi), 68008 (9.7 mi) and 68009 (10.3 mi).

Is 51556 a PO Box ZIP code?

51556 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “51556 ZIP Code — Modale, Iowa (Harrison County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/51556

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