| 1 | NRN | Royal Netherlands Navy (Koninklijke Marine) | Callsign: Netherlands Navy, | NL | AVCODES |
| 2 | NRN | Royal Netherland Navy | | | ICAO1 |
| 3 | NRNI | NORTON INC | | | SCAC3 |
| 4 | NRNK | NORTANK CARRIERS A S | | | SCAC3 |
| 5 | NRNM | NEWFOUNDLAND RESOURCES & MINING | | | SCAC3 |
| 6 | NRNS | NORMAN & SON INC | | | SCAC3 |
| 7 | NRNX | Keith Railway Equipment Co. | 1/1952 | | NAKINA |
| 8 | NRNX | Northwestern Refining Co. | 1/1950 | | NAKINA |
| 9 | NRNX | Keith Railway Equipment Co. | Jan-52 | | NRHS |
| 10 | NRNX | *NORTHWESTERN REFINING CO. | | | PWRC |
| 11 | NRNX | *KEITH RAILWAY EQUIPMENT CO. | | | PWRC |
| 12 | NRNY | NORTHERN RAILROAD OF NEW YORK | | | PWRC |
| 13 | NRNY | Northern Railroad (New York) | | | RSRV |
