CBP port code · Port of entry

Great Falls, MT port code: 3304

The CBP port code for Great Falls, MT is 3304; it is in the Great Falls, MT customs district (district code 33).

Port code: 3304
District: 33
State: Montana

Port details

About port code 3304

Port code	3304
Port of entry	Great Falls, MT
As listed	GREAT FALLS, MT
Customs district	Great Falls, MT (33)
State	Montana (MT)
On CBP's list	Yes, ACE Appendix E (revised 3 February 2026)

Importing through Great Falls, MT

Where the code goes

Where port code 3304 is used

The four-digit code identifies the port on US import paperwork. Your customs broker usually enters it, but importers and exporters see it on the documents.

CBP Form 7501

The entry summary takes Schedule D codes in the port code box (where the entry is filed) and in box 20, the U.S. port of unlading.

Carrier manifest

CBP publishes its port code list for import manifests filed in ACE. The carrier's manifest names the US port of unlading by this code.

ISF for ocean cargo

The importer, or its agent, files the Importer Security Filing at least 24 hours before the container is loaded abroad. CBP matches it to the manifest by bill of lading.

Questions

Port code 3304: FAQs

What is the port code for Great Falls, MT?

The CBP port code for Great Falls, MT is 3304. It is in the Great Falls, MT customs district (district code 33).

Where is port code 3304 used?

On CBP Form 7501, the entry summary, four-digit Schedule D codes go in the port code box (the port where the entry is filed) and in box 20, the U.S. port of unlading. Carriers use the same codes for the port of unlading on their import manifests. Your customs broker normally fills these in.

Which customs district is Great Falls, MT in?

The first two digits of a Schedule D code are its district, so 3304 is in the Great Falls, MT customs district (district code 33). This list has 20 other ports of entry in that district.

How do I get a quote for shipping from India to Great Falls?

Send Atmavaan the cargo, where it is made in India and the US delivery address. We quote the routing by sea or air, and can file the ISF for ocean cargo and arrange US customs clearance.

How current is this port code?

This page uses the Census Bureau's Schedule D district and port list (April 2025 edition), checked against CBP's ACE Appendix E port code list revised 3 February 2026. CBP opens, closes and renumbers ports from time to time, so confirm the code with your customs broker before filing.

Source: Census Bureau Schedule D district and port list (April 2025), checked against CBP's ACE Appendix E port codes (revised 3 February 2026); UN/LOCODE links from the UNECE code list. Public-domain US government data. Confirm codes with your customs broker before filing.