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 — CITY/MI/FRONTIER

Frontier ZIP code, Michigan

The ZIP code for Frontier, MI is 49239, and its area code is 517.

USPS city name
1 ZIP code
Area code
517

ZIP codes addressed as Frontier

ZIP codes with the USPS city name Frontier
ZIP City Type
49239 Frontier , MI No street area

Towns near Frontier

Towns near Frontier
TownPopulationDistance
Hillsdale 8,002 10.2 mi
Montpelier, OH 3,905 13.7 mi
Bryan, OH 8,631 21.8 mi
Angola, IN 9,408 23.1 mi
Coldwater 13,671 23.2 mi
Archbold, OH 4,397 24.0 mi
Butler, IN 2,660 28.2 mi
Wauseon, OH 7,505 28.7 mi
Adrian 20,395 29.9 mi

More nearby: every ZIP code in Hillsdale County · Michigan ZIP codes

Cite this page

zipcodes.pro. “Frontier, MI ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mi/frontier

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