CBSA office · Land border crossing

0503Gretna in Manitoba

0503 is the CBSA office code for Gretna, a land border crossing in Manitoba. No warehouse code reports to it.

Warehouse codes report to 0503

No warehouse code reports to 0503.

The land crossings nearest this office, each with the US port across from it. Distances are in a straight line, not by road.

Enter 0503 as the CBSA office where the goods are released.
If the goods wait in a sufferance or bonded warehouse, add its sub-location code next to the office code.
If the goods were exported from the United States, add the US port they left through.

0503
Same digits, two places. As a CBSA office code, 0503 is Gretna. As a US port of exit, it is Melville, Rhode Island. The line on the form says which list it asks for.
1001
Courier shipments. Low-value courier shipments name 1001, New York, as the US port of exit.

Gretna: a land border crossing in Manitoba. 0503 is its four-digit CBSA office code.

None. No warehouse sub-location code on CBSA’s list reports to 0503.

3404 Neche, North Dakota. Both codes are on the Gretna–Neche crossing page.

As a CBSA office code, 0503 is Gretna. As a US port of exit, it is Melville, Rhode Island. The line on the form says which list it asks for.

Sources: Directory of CBSA offices and services, Canada Border Services Agency; Sub-location codes for customs sufferance warehouses, Canada Border Services Agency, version of July 27, 2026; Ports of entry, U.S. Customs and Border Protection; Memorandum D17-1-10, Coding of Customs Accounting Documents, Canada Border Services Agency.

Office types and map positions are ours: the type is read from the office’s name, and each office is placed at its town.

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.