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/83606

83606

ZIP 83606 is in Caldwell, Idaho, in Canyon County; area codes 208 and 986; Mountain time. Caldwell has 3 ZIP codes; the others are 83605 and 83607.

Type
No street area
Time zone
America/Boise
County
Canyon
Metro area
Boise City, ID
Coordinates
43.7249, -116.7989

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 83656, whose figures describe that area — not this ZIP code.

☼ Live from 83606 — Caldwell, ID

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Where 83606 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 83606
  • 🔢 Type 83606 into a pocket calculator and turn it upside down: gOgEB — not quite a word, sorry.
  • ➕ As a number, 83,606 = 2 × 17 × 2459. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10100011010010110
  • 🏠 Its numerical neighbours: 83605 (Caldwell, ID, 8 mi away) and 83607 (Caldwell, ID, 3 mi away).
  • 🔄 Backwards, 83606 becomes 60638 — and that is a real ZIP code: Chicago, IL, 1,471 miles away.
  • 👥 18 other ZIP codes are made of exactly the same digits (03866, 06836, 30668, 36068, 36608, 36860, …). The farthest-flung twin is 03866 in Rochester, NH, 2,266 miles away.
  • 🧭 Farther north than 86% of all ZIP codes, and farther west than 89%.
  • 🎯974 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 83606 and you would come out at 43.72°S, 63.20°E — 512 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 27m of daylight. Shortest: 8h 55m.
🌙 The sky over 83606 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments19This ZIP19
Employees323This ZIP323
Annual payroll$17,781,000This ZIP$17,781,000

Land area

ZIP codes near 83606

ZIPCityDistance
83656 Notus, ID 0.2 mi
83607 Caldwell, ID 3.2 mi
83626 Greenleaf, ID 4.2 mi
83676 Wilder, ID 7.2 mi
83660 Parma, ID 8.3 mi
83630 Huston, ID 8.5 mi
83605 Caldwell, ID 8.5 mi
83652 Nampa, ID 9.0 mi
83653 Nampa, ID 9.9 mi
83644 Middleton, ID 10.8 mi

Find every ZIP code within 10 miles of 83606 →

Questions about this ZIP code

Where is ZIP code 83606?

83606 is in Caldwell, Idaho, in Canyon County, part of the Boise City, ID metropolitan area. Its published point location is 43.7249, -116.7989.

What county is 83606 in?

83606 lies in Canyon County.

What area code is 83606?

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

What time zone is 83606 in?

83606 uses America/Boise.

What ZIP codes are near 83606?

The closest are 83656 (0.2 mi), 83607 (3.2 mi), 83626 (4.2 mi), 83676 (7.2 mi) and 83660 (8.3 mi).

Is 83606 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. “83606 ZIP Code — Caldwell, Idaho (Canyon County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/83606

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curl https://zipcodes.pro/zip/83606.json

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