World Sea Ports
| Port Name | Port Code | Country Name |
|---|---|---|
| Isole Tremiti | ITTMT | Italy |
| Isolotto Formica | ITFOR | Italy |
| Isozaki | JPISX | Japan |
| Ispringen | DEISP | Germany |
| Issai | JPISA | Japan |
| Isshiki | JPIKJ | Japan |
| Isso | JPKYR | Japan |
| Issou | FRIOU | France |
| Issum | DEISU | Germany |
| Ist | HRIST | Croatia |