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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/83728

83728

ZIP 83728 is in Boise, Idaho, in Ada County; area codes 208 and 986; Mountain time. Boise has 28 ZIP codes in all.

Type
No street area
Time zone
America/Boise
County
Ada
Metro area
Boise City, ID
Coordinates
43.6135, -116.2035

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 83702, whose figures describe that area — not this ZIP code.

☼ Live from 83728 — Boise, ID

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Where 83728 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 83728
  • 🔢 Type 83728 into a pocket calculator and turn it upside down: BZLEB — not quite a word, sorry.
  • ➕ As a number, 83,728 = 2 × 2 × 2 × 2 × 5233. Its digits add up to 28, a total 1,520 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10100011100010000
  • 🏠 Its numerical neighbours: 83726 (Boise, ID, 11 mi away) and 83729 (Boise, ID, 11 mi away).
  • 🔄 Backwards, 83728 becomes 82738, which is not a ZIP code at all.
  • 👥 26 other ZIP codes are made of exactly the same digits (23878, 23887, 27883, 28378, 28387, 28738, …). The farthest-flung twin is 32878 in Orlando, FL, 2,188 miles away.
  • 🧭 Farther north than 86% of all ZIP codes, and farther west than 89%.
  • 🎯944 miles west of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 83728 and you would come out at 43.61°S, 63.80°E — 500 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 26m of daylight. Shortest: 8h 56m.
🌙 The sky over 83728 today
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Source: USGS.

Land area

ZIP codes near 83728

ZIPCityDistance
83707 Boise, ID 0.0 mi
83735 Boise, ID 0.0 mi
83799 Boise, ID 0.0 mi
83720 Boise, ID 0.3 mi
83724 Boise, ID 0.6 mi
83725 Boise, ID 0.6 mi
83706 Boise, ID 1.6 mi
83701 Boise, ID 3.5 mi
83703 Boise, ID 4.0 mi
83705 Boise, ID 4.2 mi

Find every ZIP code within 10 miles of 83728 →

Questions about this ZIP code

Where is ZIP code 83728?

83728 is in Boise, Idaho, in Ada County, part of the Boise City, ID metropolitan area. Its published point location is 43.6135, -116.2035.

What county is 83728 in?

83728 lies in Ada County.

What area code is 83728?

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

What time zone is 83728 in?

83728 uses America/Boise.

What ZIP codes are near 83728?

The closest are 83707 (0 mi), 83735 (0 mi), 83799 (0 mi), 83720 (0.3 mi) and 83724 (0.6 mi).

Is 83728 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. “83728 ZIP Code — Boise, Idaho (Ada County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/83728

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