Border crossing
Sarnia–Port Huron crossing codes
At Sarnia the CBSA office code is 0440. If the goods left the United States through Port Huron, Michigan, the US port code is 3802.
- Canada · CBSA office
- 0440 Sarnia
- United States · US port of exit
- 3802 Port Huron, Michigan
- Province
- Ontario
Warehouses at 0440
3 active warehouse codes report to the Canadian side. Goods can wait in one until CBSA releases them.
Nearby crossings
Good to know
US port of exit
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.
Questions
What is the CBSA office code for Sarnia?
0440, on the Canadian side of the Sarnia–Port Huron crossing.
What is the US port code for Port Huron, Michigan?
3802, on the US side of the Sarnia–Port Huron crossing.
Sources: Directory of CBSA offices and services, Canada Border Services Agency; Ports of entry, U.S. Customs and Border Protection; Memorandum D17-1-10, Coding of Customs Accounting Documents, Canada Border Services Agency; Sub-location codes for customs sufferance warehouses, Canada Border Services Agency, version of July 27, 2026.
Which US port faces which CBSA office is matched by location; neither agency publishes it as a list.
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