| 1 | MCB | Tbilisi State Aviation Corporation | | UA | AVCODES |
| 2 | MCB | Air Mercia | Callsign: Westmid, Ceased operations. | GB | AVCODES |
| 3 | MCB | Air Mercia | | | ICAO1 |
| 4 | MCBD | MERCER TRANSPORTATION CO INC (BROKE | | | SCAC4 |
| 5 | MCBH | MARCUS & CO ESTATE BUYERS INC | | | SCAC4 |
| 6 | MCBI | MONTALCO CABINETS LTD | | | SCAC4 |
| 7 | MCBJ | MR BILLS COMMON CONTRACT CARRIER IN | | | SCAC4 |
| 8 | MCBK | MCB TRUCKING INC | | | SCAC4 |
| 9 | MCBR | MCBRIDE TRUCKING | | | SCAC4 |
| 10 | MCBU | MOELLER CHEMIE GMBH & CO. KG | | D | BIC |
| 11 | MCBY | MCBRAYER TRUCKING | | | SCAC4 |
