| Carrier Code | Carrier Name |
| NAIU | NIGERIA AMERICA LINE LIMITED |
| NAMU | NEDERLANDSE AARDOLIE MAATSCHAPPIJ BV |
| NANU | NAVIERA LAVINEL |
| NAPU | NAVIERA PACIFICO CA |
| NAPW | NAVIERA AMAZONICA PERUANA S A |
| NASA | NORTH AMERICAN SHIPPING AGENCIES INC |
| NASU | NASSAU LEASING CORPORATION |
| NATU | NASSO SA |
| NAVG | NAVIGATOR SHIPPING LTD |
| NAVU | NAVIERA INTERAMERICANA NAVICANA S A |
| NAWU | NORTH AMERICAN WEST AFRICAN LINE |
| NAXU | NAPHTACHIMIE |
| NBAC | NORFOLK, BALTIMORE & CAROLINA LINE INC |
| NBLR | NOBEL ROAD S A |
| NBNV | NOBEL NAVIGATION CO LTD, OF CYPRUS |
