--- title: "US port code 3801: Detroit, Michigan · Adhoc" description: "3801 is the US port of exit code for Detroit, Michigan on Canadian customs declarations. CBSA office across: CBSA office 0453, Windsor - Ambassador Bridge, and CBSA office 0452, Windsor Tunnel." canonical: "https://www.adhocs.ca/us-ports-of-exit/3801" last_updated: 2026-07-27 --- # 3801 Detroit, Michigan US port of exit US port of exit · Land border crossing 3801 is the US code for the port of Detroit, Michigan. A Canadian declaration uses it when goods left the United States through Detroit. Across the border is CBSA office 0453, Windsor - Ambassador Bridge, and CBSA office 0452, Windsor Tunnel. - **Port code:** 3801 - **Port:** Detroit - **State:** [Michigan](https://www.adhocs.ca/us-ports-of-exit/michigan) - **CBP district:** Detroit, MI - **Kind:** Land border crossing - **Across the border:** [0453](https://www.adhocs.ca/cbsa-offices/0453) Windsor - Ambassador Bridge; [0452](https://www.adhocs.ca/cbsa-offices/0452) Windsor Tunnel - **Crossing:** [Windsor–Detroit](https://www.adhocs.ca/border-crossings/windsor-detroit) ## Windsor–Detroit both codes - [Windsor–Detroit](https://www.adhocs.ca/border-crossings/windsor-detroit): [0453](https://www.adhocs.ca/cbsa-offices/0453) Windsor - Ambassador Bridge, [0452](https://www.adhocs.ca/cbsa-offices/0452) Windsor Tunnel ⇄ [3801](https://www.adhocs.ca/us-ports-of-exit/3801) Detroit, Michigan ## Other US ports in Michigan - [3802](https://www.adhocs.ca/us-ports-of-exit/3802) Port Huron (faces 0440) - [3803](https://www.adhocs.ca/us-ports-of-exit/3803) Sault Ste. Marie (faces 0441) - [3804](https://www.adhocs.ca/us-ports-of-exit/3804) Saginaw/Bay City (Port of entry) - [3805](https://www.adhocs.ca/us-ports-of-exit/3805) Battle Creek (Port of entry) - [3806](https://www.adhocs.ca/us-ports-of-exit/3806) Grand Rapids (Port of entry) - [3807](https://www.adhocs.ca/us-ports-of-exit/3807) Detroit Metro Airport, Detroit (Airport) - [3808](https://www.adhocs.ca/us-ports-of-exit/3808) Escanaba (Port of entry) - [3809](https://www.adhocs.ca/us-ports-of-exit/3809) Marquette (Port of entry) - [3814](https://www.adhocs.ca/us-ports-of-exit/3814) Algonac (faces 0465) - [3815](https://www.adhocs.ca/us-ports-of-exit/3815) Muskegon (Port of entry) - [3816](https://www.adhocs.ca/us-ports-of-exit/3816) Grand Haven (Port of entry) - [3818](https://www.adhocs.ca/us-ports-of-exit/3818) Rogers City (Port of entry) - [3819](https://www.adhocs.ca/us-ports-of-exit/3819) Detour (Port of entry) - [3842](https://www.adhocs.ca/us-ports-of-exit/3842) Presque Isle (Port of entry) - [3843](https://www.adhocs.ca/us-ports-of-exit/3843) Alpena (Port of entry) - [3881](https://www.adhocs.ca/us-ports-of-exit/3881) Oakland/Pontiac Airport (Airport) - [3882](https://www.adhocs.ca/us-ports-of-exit/3882) Willow Run Airport, Ypsilanti (Airport) - [3883](https://www.adhocs.ca/us-ports-of-exit/3883) Capital Region Intl Airport, Lansing (Airport) ## Good to know - **Also a US port code.** 3801 is also the US port of exit code for Detroit, Michigan. Warehouse and US port codes go on different lines of a declaration. - **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. - **Gordie Howe International Bridge.** CBSA added an export office for the new Windsor–Detroit bridge. Its code will appear here once it is on CBSA’s published list. 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 3801? The code for the port of Detroit, Michigan. On a Canadian declaration, it says the goods left the United States through it. ### Which CBSA office is across from 3801? 0453, Windsor - Ambassador Bridge; and 0452, Windsor Tunnel. ## 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.