Border crossing

Aldergrove–Lynden crossing codes

At Aldergrove the CBSA office code is 0841. If the goods left the United States through Lynden, Washington, the US port code is 3023.

Warehouses at 0841

30 active warehouse codes report to the Canadian side. Goods can wait in one until CBSA releases them.

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.

0841, on the Canadian side of the Aldergrove–Lynden crossing.

3023, on the US side of the Aldergrove–Lynden 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.

Adhoc is not affiliated with CBSA or CBP.

Adhoc’s agents classify each line, check it against CBSA and agency rules, and draft the declaration for your team to submit.