| 1 | MTL | RAF-Avia | IATA: MT, Callsign: Mitavia, Established on 31 October 1990. Commenced operations on 19 August 1991. | LV | AVCODES |
| 2 | MTL | RAF-Avia | | | ICAO1 |
| 3 | MTL | MONTANA LINES COMMITTEE | | | SCAC4 |
| 4 | MTL | MTL London Northern | City: London | GB | TRAFFIC |
| 5 | MTLA | MELTON TRUCK LINES | | | SCAC1 |
| 6 | MTLA | MELTON TRUCK LINES INC | | | SCAC4 |
| 7 | MTLC | MARTIN TRANS-LOGICS INC | | | SCAC4 |
| 8 | MTLD | MICHAEL TOOL & MOLD LTD | | | SCAC4 |
| 9 | MTLE | MODE TRANSPORTATION LLC | | | SCAC4 |
| 10 | MTLF | MAP TRANSPORT LLC | | | SCAC4 |
| 11 | MTLI | M E P TECHNOLOGIES INC | | | SCAC4 |
| 12 | MTLJ | MORGAN TANK LINES | | | SCAC4 |
| 13 | MTLL | MATTHEWS TRUCKING LLC | | | SCAC4 |
| 14 | MTLM | MABL TRUCKING LLC. | | | SCAC4 |
| 15 | MTLN | MERCHANTS TRUCKLOAD COMPANY, INC | | | SCAC1 |
| 16 | MTLP | MUTUAL TRANSPORTATION SERVICES INC | | | SCAC4 |
| 17 | MTLQ | MT. LASSEN MOTOR TRANSIT, INC | | | SCAC1 |
| 18 | MTLR | MOTOR CITY ELECTRIC CO | | | SCAC4 |
| 19 | MTLU | DUTCH ANTILLEAN CONTAINER LEASING LTD | | CY | BIC |
| 20 | MTLU | MONTGOMERY TANK LINES | | | PWRC |
| 21 | MTLU | Montgomery Tank Lines | | | RSRV |
| 22 | MTLU | NATIONAL SHIPPING COMPANY | | | SCAC3 |
| 23 | MTLW | MAD TRUCKING LLC | | | SCAC4 |
| 24 | MTLX | Metal Link International, LLC | added 10/2001; eliminated 1/2004; 7/2005 (not listed) | | NAKINA |
| 25 | MTLX | Morris & Co. Tank Line (Armour Car Lines) | 7/1923 | | NAKINA |
| 26 | MTLX | McKenzie Tank Lines, Inc. | added 1/1964; eliminated 4/1965; 7/1965 (not listed) | | NAKINA |
| 27 | MTLX | Morris & Co. Tank Line (Morris & Co. Refrigerator Line) | 8/1920 | | NAKINA |
| 28 | MTLX | McKenzie Tank Lines, Inc. | eliminated 4/65; 7/65 | | NRHS |
| 29 | MTLX | *ARMOUR CAR LINES [MORRIS & CO. TANK LINE] | | | PWRC |
| 30 | MTLX | *MCKENZIE TANK LINES, INC. | | | PWRC |
| 31 | MTLX | +METAL LINK INTERNATIONAL, LLC | | | PWRC |
| 32 | MTLX | Metal Link International | | | RSRV |
| 33 | MTLX | METAL LINK INTERNATIONAL LLC | | | SCAC4 |
| 34 | MTLZ | MARKET TRANSPORT LTD | | | SCAC4 |
