| 1 | SGB | Sky King, Inc. d/b/a Fly First Class | IATA: F3, Callsign: Songbird, Name changed to Skyking Inc. | USA | AVCODES |
| 2 | SGB | Sky King, Inc. | IATA: F3, Callsign: Songbird, Designator F3* recalled by IATA. Name changed from Sky King, Inc. d/b/a Fly First Class | USA | AVCODES |
| 3 | SGB | Sky King, Inc. | IATA: 5K, Callsign: Songbird, Ceased operations on 26 January 2014. Designator F3* recalled by IATA. Name changed from Sky King, Inc. d/b/a Fly First Class | USA | AVCODES |
| 4 | SGB | Sky King, Inc. | IATA: 6K, Callsign: Songbird, Operations resumed on 22 December 2014. Founded in July 1990. Ceased operation on 26 January 2014. Designator F3* recalled by IATA | USA | AVCODES |
| 5 | SGB | Songbird Airways, Inc. | IATA: 6K, Callsign: Songbird, Name changed from Sky King, Inc in June 2015. | USA | AVCODES |
| 6 | SGB | Sky King | | | ICAO1 |
| 7 | SGB | Stoomtram Goes-Borsele | | NL | TRAFFIC |
| 8 | SGBA | STERLING BROKERAGE SERVICES INC | | | SCAC4 |
| 9 | SGBI | SECURE GLOBAL LOGISTICS INC | | | SCAC4 |
| 10 | SGBM | SEA GLOBAL SCM LTD | | | SCAC4 |
| 11 | SGBN | STAR FREIGHT BROKERS INC | | | SCAC4 |
| 12 | SGBO | SUMISHO GLOBAL LOGISTICS CO LTD | | | SCAC4 |
| 13 | SGBV | SIRIUS GLOBAL LOGISTICS CO LTD | | | SCAC4 |
