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Schedule K is a geographic coding scheme originally developed by the United States Maritime Administration and currently maintained by the United States Army Corps of Engineers to identify seaports handling waterborne shipments involved with foreign trade of the United States. The codes consist of five numeric digits and are primarily for electronic communications concerning U.S. Customs.[1]
Code lists are maintained and published by the Waterborne Commerce Statistics Center division of the United States Army Corps of Engineers.
Each country's ports share a common three digit prefix which is unique per country (with the exception of Canada which has 21 prefixes grouped by geographic region). For example all ports in the Denmark begin with 409, while the United Kingdom prefix is 412.
The system is organized such that the first digit roughly corresponds to a broad geographic region:
| First Digit | Region | Example Code |
|---|---|---|
| 0 | Canada (Great Lakes Region) | 01822 (Montreal, QC, Canada) |
| 1 | Canada (Pacific & Atlantic Regions), Greenland | 12493 (Vancouver, BC, Canada) |
| 2 | Central America and Caribbean | 23944 (Havana, Cuba) |
| 3 | South America | 35177 (Sao Paulo, Brazil) |
| 4 | Europe | 47507 (Naples, Italy) |
| 5 | Asia | 50801 (Haifa, Israel) |
| 6 | Oceania | 60267 (Sydney, Australia) |
| 7 | Africa | 72901 (Alexandria, Egypt) |
| 9 | US Territories and Foreign Military Bases | 93501 (Guam Island) |
