| 1 | MKL | McCall Aviation, Inc. | IATA: S6, Callsign: Mccall, | USA | AVCODES |
| 2 | MKL | McCall Aviation, Inc. | Callsign: Mccall, IATA Designator S6 recalled. | USA | AVCODES |
| 3 | MKL | McCall Aviation | | | ICAO1 |
| 4 | MKLA | MCALISTER TRANSPORTATION LLC | | | SCAC4 |
| 5 | MKLB | M & K LOGISTICS LLC | | | SCAC4 |
| 6 | MKLJ | MARKUS LOGISTICS INC | | | SCAC4 |
| 7 | MKLL | MCKELL TRANSPORTATION REGD | | | SCAC4 |
| 8 | MKLM | MAJOR KAT LEASING INC | | | SCAC4 |
| 9 | MKLN | MAERSK LINE LIMITED | | | SCAC4 |
| 10 | MKLP | MERKEL, PERRY D INC | | | SCAC4 |
| 11 | MKLU | MEDKON LINES | | TR | BIC |
| 12 | MKLY | MARKLEY TRANSPORT | | | SCAC4 |
