| 1 | 4B | Olson Air Service, Inc. | | USA | AVCODES |
| 2 | 4B | Olson & Sons Inc d/b/a Olson Air Service | | USA | AVCODES |
| 3 | 4B | Aviastar-Tu Co. Ltd | ICAO: TUP, Callsign: Tupolevair, IATA Prefix: 210, | RUS | AVCODES |
| 4 | 4B | MC Aviation Corp d/b/a Boutique Air, Inc. | Name changed to Boutique Air, Inc. | USA | AVCODES |
| 5 | 4B | Perimeter Aviation Ltd. | ICAO: PAG, Callsign: Perimeter, Designator 4B recalled by IATA | CDN | AVCODES |
| 6 | 4B | Boutique Air, Inc. | ICAO: BTQ, Callsign: Boutique, Name changed from MC Aviation Corp d/b/a Boutique Air, Inc. | USA | AVCODES |
