| 1 | NLF | Westair Aviation, Inc. | Callsign: Northern Life, | CDN | AVCODES |
| 2 | NLFE | NIELSENS FEED | | | SCAC3 |
| 3 | NLFH | NEVER LATE FREIGHT | | | SCAC4 |
| 4 | NLFI | NATIONAL FREIGHT INC (INTERMODAL DI | | | SCAC4 |
| 5 | NLFL | NEW LINE FREIGHT LLC | | | SCAC4 |
| 6 | NLFM | NICKEL LANE FARMS | | | SCAC4 |
| 7 | NLFO | NATIONAL FUEL OIL INC | | | SCAC4 |
| 8 | NLFR | NORTON, LINDA FREIGHT SERVICE INC | | | SCAC3 |
| 9 | NLFS | NELSON FREIGHT SERVICE INC | | | SCAC3 |
| 10 | NLFX | National Lead Co. | added 10/1963; 7/1965-10/1966; eliminated 1/1970 | | NAKINA |
| 11 | NLFX | National Lead Co. | 7/65-10/66; eliminated 1/70 | | NRHS |
| 12 | NLFX | NATIONAL LEAD CO. | | | PWRC |
| 13 | NLFX | NATIONAL LEAD CO | | | SCAC3 |
