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/49239

49239

ZIP 49239 is Frontier, Michigan, in Hillsdale County; area code 517; Eastern time.

Type
No street area
Time zone
America/Detroit
County
Hillsdale
Metro area
Hillsdale, MI
Coordinates
41.7825, -84.6047

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 49242, whose figures describe that area — not this ZIP code.

☼ Live from 49239 — Frontier, MI

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Where 49239 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 49239
  • 🔢 Type 49239 into a pocket calculator and turn it upside down: GEZGh — not quite a word, sorry.
  • ➕ As a number, 49,239 = 3 × 3 × 5471. Its digits add up to 27, a total 1,806 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100000001010111
  • 🏠 Its numerical neighbours: 49238 (Deerfield, MI, 43 mi away) and 49240 (Grass Lake, MI, 40 mi away).
  • 🔄 Backwards, 49239 becomes 93294, which is not a ZIP code at all.
  • 👥 19 other ZIP codes are made of exactly the same digits (24993, 29349, 29439, 29493, 29934, 29943, …). The farthest-flung twin is 94923 in Bodega Bay, CA, 2,029 miles away.
  • 🧭 Farther north than 73% of all ZIP codes, and farther east than 58%.
  • 🎯742 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 49239 and you would come out at 41.78°S, 95.40°E — 1,314 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 13m of daylight. Shortest: 9h 08m.
🌙 The sky over 49239 today
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🌋 Shake report
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Source: USGS.

Land area

ZIP codes near 49239

ZIPCityDistance
49232 Camden, MI 4.2 mi
49266 Osseo, MI 5.0 mi
49242 Hillsdale, MI 7.2 mi
49271 Pittsford, MI 8.5 mi
43554 Pioneer, OH 8.8 mi
49274 Reading, MI 9.1 mi
49288 Waldron, MI 9.6 mi
43501 Alvordton, OH 10.6 mi
43531 Kunkle, OH 11.6 mi
43543 Montpelier, OH 12.3 mi

Find every ZIP code within 10 miles of 49239 →

Questions about this ZIP code

Where is ZIP code 49239?

49239 is in Frontier, Michigan, in Hillsdale County, part of the Hillsdale, MI micropolitan area. Its published point location is 41.7825, -84.6047.

What county is 49239 in?

49239 lies in Hillsdale County.

What area code is 49239?

Frontier uses area code 517, from NANPA's telephone records.

What time zone is 49239 in?

49239 uses America/Detroit.

What ZIP codes are near 49239?

The closest are 49232 (4.2 mi), 49266 (5 mi), 49242 (7.2 mi), 49271 (8.5 mi) and 43554 (8.8 mi).

Is 49239 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. “49239 ZIP Code — Frontier, Michigan (Hillsdale County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/49239

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/49239.json

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