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/83403

83403

ZIP 83403 is in Idaho Falls, Idaho, in Bonneville County; area codes 208 and 986; Mountain time. Idaho Falls has 7 ZIP codes in all.

Type
No street area
Time zone
America/Boise
County
Bonneville
Metro area
Idaho Falls, ID
Coordinates
43.4666, -112.0341

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 83404, whose figures describe that area — not this ZIP code.

☼ Live from 83403 — Idaho Falls, ID

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Where 83403 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 83403
  • 🔢 Type 83403 into a pocket calculator and turn it upside down: EOhEB — not quite a word, sorry.
  • ➕ As a number, 83,403 = 3 × 3 × 3 × 3089. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10100010111001011
  • 🏠 Its numerical neighbours: 83402 (Idaho Falls, ID, 8 mi away) and 83404 (Idaho Falls, ID, 3 mi away).
  • 🔄 Backwards, 83403 becomes 30438 — and that is a real ZIP code: Manassas, GA, 1,802 miles away.
  • 👥 25 other ZIP codes are made of exactly the same digits (03843, 04338, 08343, 30348, 30384, 30438, …). The farthest-flung twin is 34038 in APO AA, a military post office, 3,542 miles away.
  • 🧭 Farther north than 85% of all ZIP codes, and farther west than 87%.
  • 🎯738 miles northwest of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 83403 and you would come out at 43.47°S, 67.97°E — 420 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 25m of daylight. Shortest: 8h 57m.
🌙 The sky over 83403 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments46This ZIP46
Employees612This ZIP612
Annual payroll$36,491,000This ZIP$36,491,000

Land area

ZIP codes near 83403

ZIPCityDistance
83405 Idaho Falls, ID 0.0 mi
83415 Idaho Falls, ID 0.0 mi
83404 Idaho Falls, ID 2.9 mi
83406 Idaho Falls, ID 5.4 mi
83402 Idaho Falls, ID 8.5 mi
83274 Shelley, ID 8.7 mi
83401 Idaho Falls, ID 9.4 mi
83454 Ucon, ID 9.7 mi
83218 Basalt, ID 12.2 mi
83442 Rigby, ID 15.0 mi

Find every ZIP code within 10 miles of 83403 →

Questions about this ZIP code

Where is ZIP code 83403?

83403 is in Idaho Falls, Idaho, in Bonneville County, part of the Idaho Falls, ID metropolitan area. Its published point location is 43.4666, -112.0341.

What county is 83403 in?

83403 lies in Bonneville County.

What area code is 83403?

Idaho Falls uses area codes 208 and 986, from NANPA's telephone records.

What time zone is 83403 in?

83403 uses America/Boise.

What ZIP codes are near 83403?

The closest are 83405 (0 mi), 83415 (0 mi), 83404 (2.9 mi), 83406 (5.4 mi) and 83402 (8.5 mi).

Is 83403 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. “83403 ZIP Code — Idaho Falls, Idaho (Bonneville County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/83403

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