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/MT/BELKNAP

Belknap ZIP codes, Montana

No ZIP code is named for Belknap, MT; addresses there use a neighbouring town's name. The ZIP code covering it is 59873. Its area code is 406.

USPS city name
0 ZIP codes
Overlapping the city
1 more
Population
32
Area code
406
State
Montana

NANPA lists no telephone rate centre for Belknap itself, so these are the area codes of the nearest one, Thompson Falls (0.0 miles). A town on an area-code boundary can differ from its neighbour.

ZIP codes covering Belknap

These ZIP codes cover part of Belknap but are addressed as somewhere else.

ZIP codes overlapping Belknap
ZIP City Type Population Median income Median home
59873 Thompson Falls , MT Standard 2,920 $60,000 $305,900

Map of Belknap ZIP codes

59873

The ZIP codes of Belknap, MT, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Belknap

The nearest larger towns are Thompson Falls (1,500 people, 5.0 mi), Trout Creek (252 people, 15 mi) and De Borgia (40 people, 20 mi).

More nearby: every ZIP code in Sanders County · Montana ZIP codes

Cite this page

zipcodes.pro. “Belknap, MT ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mt/belknap

Underlying data is public domain or openly licensed — sources, vintages and licences.