| 1 | ALK | SriLankan Airlines Limited | IATA: UL, Callsign: Srilankan, IATA Prefix: 603, Formerly Air Lanka Limited. | CL | AVCODES |
| 2 | ALK | Air Lanka Limited | IATA: UL, Callsign: Air Lanka, IATA Prefix: 603, Name changed to Srilankan during 1998. IATA designator changed from UJ | CL | AVCODES |
| 3 | ALK | Air Lanka Limited | IATA: UJ, Callsign: Air Lanka, Commenced operations on 01 September 1979. IATA designator changed to UL | CL | AVCODES |
| 4 | ALK | SriLankan Airlines | IATA: UL | | ICAO1 |
| 5 | ALK | SriLankan Airlines | | CL | TRAFFIC |
| 6 | ALKA | ALASKA MOVING & STORAGE INC | | | SCAC3 |
| 7 | ALKA | ALASKA TRANSPORT LLC | | | SCAC4 |
| 8 | ALKB | A L & M TRUCK LINES | | | SCAC3 |
| 9 | ALKB | ATLANTIC TILTLOAD LTD | | | SCAC4 |
| 10 | ALKC | ALLIANCE TRUCKING INC | | | SCAC4 |
| 11 | ALKD | A C TRANSPORT LTD | | | SCAC3 |
| 12 | ALKD | AIRLINK EXPRESS INC | | | SCAC4 |
| 13 | ALKE | ALKEL ENTERPRISES INC | | | SCAC3 |
| 14 | ALKF | A L F TRUCKING INC | | | SCAC3 |
| 15 | ALKF | ANYTIME LOGISTICS INC | | | SCAC4 |
| 16 | ALKG | ALLRED, DENNIS R TRUCKING CO | | | SCAC3 |
| 17 | ALKH | ALLEN TRUCKING | | | SCAC3 |
| 18 | ALKI | ALMIN TRUCKING CO INC | | | SCAC3 |
| 19 | ALKJ | ALKERTON, JOHN | | | SCAC3 |
| 20 | ALKK | ALEGRE, LAWRENCE M TRUCKING INC | | | SCAC4 |
| 21 | ALKL | ALABAMA TRUCK LINES INC | | | SCAC3 |
| 22 | ALKM | A & M TRANSPORT INC | | | SCAC3 |
| 23 | ALKM | A & M TRANSPORT INC | | | SCAC4 |
| 24 | ALKO | A L R TRUCKING | | | SCAC3 |
| 25 | ALKP | ALK ASSOCIATES INC | | | SCAC3 |
| 26 | ALKP | A & L TRUCKING INC | | | SCAC4 |
| 27 | ALKQ | ALS TRUCKING COMPANY INC | | | SCAC3 |
| 28 | ALKQ | ATKINSON LEASING & MANAGEMENT COMPA | | | SCAC4 |
| 29 | ALKS | AUSTIN-LAWS TRUCK LINES INC | | | SCAC3 |
| 30 | ALKS | AUTONOMIC LOGISTICS INC | | | SCAC4 |
| 31 | ALKT | ALT INTERMODAL INC | | | SCAC4 |
| 32 | ALKU | ALTUN LOJISTIK A.S. | | TR | BIC |
| 33 | ALKX | Airlake Terminal Ry. Co., LLC-Railcar Leasing | added 7/2008 | | NAKINA |
| 34 | ALKX | Airlake Terminal Ry. Co. | added 10/2003; eliminated 1/2004; 7/2005 (not listed); added 10/2005; eliminated 7/2008 | | NAKINA |
| 35 | ALKX | AIRLAKE TERMINAL RY. CO. | | | PWRC |
| 36 | ALKX | Airlake Terminal Railway | | | RSRV |
| 37 | ALKX | AIRLAKE TERMINAL RAILWAY COMPANY | | | SCAC4 |