Border crossing
Cornwall–Massena crossing codes
At Cornwall the CBSA office code is 0409. If the goods left the United States through Massena, New York, the US port code is 0704.
- Canada · CBSA office
- 0409 Cornwall
- United States · US port of exit
- 0704 Massena, New York
- Province
- Ontario
Warehouses at 0409
1 active warehouse code reports 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 Cornwall?
0409, on the Canadian side of the Cornwall–Massena crossing.
What is the US port code for Massena, New York?
0704, on the US side of the Cornwall–Massena 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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