--- title: "US port code 3321: Whitlash, Montana · Adhoc" description: "3321 is the US port of exit code for Whitlash, Montana on Canadian customs declarations. CBSA office across: CBSA office 0706, Aden." canonical: "https://www.adhocs.ca/us-ports-of-exit/3321" last_updated: 2026-07-27 --- # 3321 Whitlash, Montana US port of exit US port of exit · Land border crossing 3321 is the US code for the port of Whitlash, Montana. A Canadian declaration uses it when goods left the United States through Whitlash. Across the border is CBSA office 0706, Aden. - **Port code:** 3321 - **Port:** Whitlash - **State:** [Montana](https://www.adhocs.ca/us-ports-of-exit/montana) - **CBP district:** Great Falls, MT - **Kind:** Land border crossing - **Across the border:** [0706](https://www.adhocs.ca/cbsa-offices/0706) Aden - **Crossing:** [Aden–Whitlash](https://www.adhocs.ca/border-crossings/aden-whitlash) ## Aden–Whitlash both codes - [Aden–Whitlash](https://www.adhocs.ca/border-crossings/aden-whitlash): [0706](https://www.adhocs.ca/cbsa-offices/0706) Aden ⇄ [3321](https://www.adhocs.ca/us-ports-of-exit/3321) Whitlash, Montana ## Other US ports in Montana - [3301](https://www.adhocs.ca/us-ports-of-exit/3301) Raymond (faces 0607) - [3304](https://www.adhocs.ca/us-ports-of-exit/3304) Great Falls (Port of entry) - [3305](https://www.adhocs.ca/us-ports-of-exit/3305) Butte (Port of entry) - [3306](https://www.adhocs.ca/us-ports-of-exit/3306) Turner (faces 0619) - [3309](https://www.adhocs.ca/us-ports-of-exit/3309) Scobey (faces 0615) - [3310](https://www.adhocs.ca/us-ports-of-exit/3310) Sweetgrass (faces 0705) - [3316](https://www.adhocs.ca/us-ports-of-exit/3316) Piegan (faces 0707) - [3317](https://www.adhocs.ca/us-ports-of-exit/3317) Opheim (faces 0618) - [3318](https://www.adhocs.ca/us-ports-of-exit/3318) Roosville (faces 0824) - [3319](https://www.adhocs.ca/us-ports-of-exit/3319) Morgan (faces 0620) - [3322](https://www.adhocs.ca/us-ports-of-exit/3322) Del Bonita (faces 0708) - [3323](https://www.adhocs.ca/us-ports-of-exit/3323) Wildhorse (faces 0711) - [3324](https://www.adhocs.ca/us-ports-of-exit/3324) Kalispell Airport (Airport) - [3325](https://www.adhocs.ca/us-ports-of-exit/3325) Havre (Port of entry) - [3386](https://www.adhocs.ca/us-ports-of-exit/3386) Bozeman Yellowstone User Fee Airport, Belgrade (Airport) ## Good to know - **Which US port.** CBSA defines it as the US port where the truck or train crosses into Canada, or the one nearest to where it crosses. For goods sent by ship or plane, it is the US port where they were loaded. - **Courier shipments.** Low-value courier shipments name 1001, New York, as the US port of exit. Also in this directory: [CBSA offices](https://www.adhocs.ca/cbsa-offices) · [Warehouse codes](https://www.adhocs.ca/cbsa-warehouses) · [Border crossings](https://www.adhocs.ca/border-crossings) ## Questions ### What is US port code 3321? The code for the port of Whitlash, Montana. On a Canadian declaration, it says the goods left the United States through it. ### Which CBSA office is across from 3321? 0706, Aden. ## Sources - [Ports of entry](https://www.cbp.gov/contact/ports), U.S. Customs and Border Protection - [Memorandum D17-1-10, Coding of Customs Accounting Documents](https://www.cbsa-asfc.gc.ca/publications/dm-md/d17/d17-1-10-eng.html), Canada Border Services Agency - [Directory of CBSA offices and services](https://www.cbsa-asfc.gc.ca/do-rb/menu-eng.html), Canada Border Services Agency Which US port faces which CBSA office is matched by location; neither agency publishes it as a list. Adhoc is not affiliated with CBSA or CBP.