| 1 | MUK | Muk Air | IATA: ZR, Callsign: Mukair, IATA Prefix: 796, Designator ZR recalled by IATA | DK | AVCODES |
| 2 | MUK | Muk Air | Callsign: Mukair, Ceased operations on 05 November 2001. Designator ZR recalled by IATA | DK | AVCODES |
| 3 | MUKC | MONK TRUCKING CO LLC | | | SCAC4 |
| 4 | MUKE | MUSKET TRANSPORT LTD, THE | | | SCAC4 |
| 5 | MUKF | MUNDO TRUCKING INC | | | SCAC4 |
| 6 | MUKG | MARS TRUCKING | | | SCAC4 |
| 7 | MUKI | MAR TRUCKING | | | SCAC4 |
| 8 | MUKL | MORT TRUCKING LLC | | | SCAC4 |
| 9 | MUKN | MULLIKIN, MICHAEL L TRUCKING CO | | | SCAC4 |
| 10 | MUKO | MAXWELL, ROBERT TRUCKING LTD | | | SCAC4 |
| 11 | MUKT | MUSKOKA TRANSPORT LIMITED | | | SCAC4 |
| 12 | MUKU | DEN HARTOGH GLOBAL BV | | NL | BIC |
| 13 | MUKU | MUTO CO LTD | | | SCAC4 |
| 14 | MUKY | MOUNTAIN CREEK TAXIDERMY | | | SCAC4 |
