| 1 | NBN | North British Airlines Ltd. | Callsign: Teessair, | GB | AVCODES |
| 2 | NBN | North British Airlines | | | ICAO1 |
| 3 | NBN | NICOLET BADGER NORTHERN RAILROAD, INC. | | | PWRC |
| 4 | NBNA | NATIONAL BLACK NURSES ASSN | | | SCAC4 |
| 5 | NBNR | Nicolet Badger Northern R.R., Inc. | added 10/1980; eliminated 1/1989; 1/1994; eliminated 4/1995; 7/2000-7/2005 | | NAKINA |
| 6 | NBNR | Nicolet Badger Northern R.R., Inc. | added 10/80; eliminated 1/89; 1/94; eliminated 4/95; 7/2000 | | NRHS |
| 7 | NBNR | NICOLET BADGER NORTHERN RAILROAD, INC. | | | PWRC |
| 8 | NBNR | Nicolet Badger Northern Railroad | | | RSRV |
| 9 | NBNR | NICOLET BADGER NORTHERN RAILROAD IN | | | SCAC3 |
| 10 | NBNV | NOBEL NAVIGATION CO. LTD. OF CYPRUS | | | SCAC3 |
