Random Montana Address Generator

These addresses are randomly generated for software testing. They are not real people’s details: the street number, unit and recipient name are invented, and no record is checked for deliverability.

Randomly generated Montana mailing addresses for software testing, form validation and staging data. Each record pairs a real Montana city with a ZIP prefix that serves it and the county that city sits in, then adds a street number, a secondary unit designator and a recipient name that are invented.

Official Montana Postal & Geographic Reference Specifications

Geographic & Postal Parameter Official State Specification Standardization Reference
Postal State Abbreviation MT USPS Publication 28 & ISO 3166-2:US
5-Digit ZIP Prefix Range 590xx–599xx USPS prefix-to-state assignment
Administrative Jurisdictions 56 Total Counties US Census Bureau regional boundaries
Active Area Codes (NANPA) 406 (1 total) North American Numbering Plan Administrator
State Capital Helena US Census Bureau
Primary Time Zone Mountain Time (America/Denver, UTC-7 / UTC-6 DST) IANA time zone database

Montana Postal Geography & Key Cities

ZIP codes and Sectional Center Facilities are derived from public USPS ZIP code data, area codes from the North American Numbering Plan, and county names from US Census Bureau records. Street numbers and recipient names are synthetic, and nothing is checked against an address-verification service.

Cities the generator draws from:

  • Billings
  • Missoula
  • Great Falls
  • Bozeman
  • Helena

Key Counties & Administrative Jurisdictions

County boundaries determine local sales tax jurisdictions in Montana:

  • Yellowstone County
  • Missoula County
  • Gallatin County
  • Cascade County

Montana Area Codes (MT)

Generated phone numbers use the area codes listed in the reference table above, paired with a 555 exchange so no number can reach a real line. Generate Montana phone numbers.

Postal Delivery Standards & Format Nuances in Montana

  • Single statewide 406 area code across 147,000 square miles, featuring extremely low-density rural star routes and remote ranch fire-number addressing.
  • Extensive tribal nation reservation jurisdictions including Blackfeet, Crow, and Flathead reservations.

Montana Address Examples in USPS Publication 28 Format

Residential Delivery Point:
100 Main St, Apt 4B
Billings, MT 59101-1204

Commercial / Multi-Unit Delivery Point:
Montana Logistics & Software Corp
500 Enterprise Way, Suite 300
Missoula, MT 59801-4810

Frequently Asked Questions about Montana Addresses

What ZIP codes does Montana use for mail and package delivery?

Montana (MT) operates within the 5-digit ZIP prefix range 590xx–599xx. Mail routed to state capital Helena and key regional centers such as Billings, Missoula, Great Falls adheres to these official USPS boundaries.

Which telephone area codes are valid for Montana?

Montana is served by a single statewide area code: 406. Because Montana operates under a single numbering plan area (NPA), every valid Montana phone number begins with 406 — there are no regional sub-assignments to account for in test data. Synthetic telephone numbers generated for Montana use area code 406 with a 555 exchange, which is reserved for fictitious use.

How many counties are in Montana?

Montana is divided into 56 counties, including major administrative regions such as Yellowstone, Missoula, Gallatin, Cascade. Generated street addresses use those names.

What postal formatting conventions and addressing quirks are unique to Montana?

Single statewide 406 area code across 147,000 square miles, featuring extremely low-density rural star routes and remote ranch fire-number addressing. Extensive tribal nation reservation jurisdictions including Blackfeet, Crow, and Flathead reservations. All addresses generated on this platform format secondary unit designators (Apt, Ste, Fl) and street suffixes according to USPS CASS standards.

Are the Montana addresses generated on this page real places?

No. All street numbers, recipient names, and telephone numbers generated for Montana are entirely synthetic and randomized for software testing, database seed scripts, and form validation. They use Montana ZIP codes from public USPS data and real city names, but they do not correspond to real individuals or private residences.

Nearby & Bordering States

Explore test address generators for states sharing a geographic border with MT:

Montana ZIP Prefixes

The first three digits of a ZIP code place an address within Montana. These are the prefixes assigned to the state:

591xx, 597xx, 598xx

Which processing facility sorts a given prefix is set by the current USPS labeling list L005 and changes as processing is consolidated, so it is not reproduced here. Look up a ZIP prefix to see its state and generate ZIP codes inside it.

Related Postal Tools & Technical Resources

All 51 state address generators, grouped by region.