| 1 | NKS | Spirit Airlines, Inc. | IATA: NK, Callsign: Spirit Wings, IATA Prefix: 487, | USA | AVCODES |
| 2 | NKS | Spirit Airlines | IATA: NK | | ICAO1 |
| 3 | NKSC | NIKEA SHIPPING COMPANY LTD CYPRUS | | | SCAC3 |
| 4 | NKSC | NAKKAS SHIPPING & TRADING CO LTD | | | SCAC4 |
| 5 | NKSK | NEKOROSKI OIL COMPANY INC | | | SCAC4 |
| 6 | NKSL | NORTHERN KING SHIPPING CO, LTD. | | | SCAC3 |
| 7 | NKSL | NORTHERN KING SHIPPING CO, LTD. | | | SCAC4 |
| 8 | NKSM | NICKS MOVERS | | | SCAC3 |
| 9 | NKSP | NICKS TRANSPORT INC L H | | | SCAC3 |
| 10 | NKSP | NIKOLAS SHIPPING INC | | | SCAC4 |
| 11 | NKST | NICKS TRUCK SERVICE INC | | | SCAC3 |
| 12 | NKST | NEVKAT TRANSPORT & LOGISTICS INC | | | SCAC4 |
