| 1 | ALR | Algarvilara, Transportes Aereos Algarvios, S.A. | Callsign: Algarvilara, | P | AVCODES |
| 2 | ALR | Lineas Aereas Alaire S.L. | Callsign: Aeroalaire, | E | AVCODES |
| 3 | ALR | Alaska Aeronautical Industries | Callsign: Alaska Aeronautical, | USA | AVCODES |
| 4 | ALR | S.C. Alfa Air Services S.R.L. | Callsign: Alfa Group, | RO | AVCODES |
| 5 | ALR | Alborz Air | Callsign: Alborz, | IR | AVCODES |
| 6 | ALR | Lineas Aereas Alaire S.L. | | | ICAO1 |
| 7 | ALR | ALGOMA RAILROAD | | | PWRC |
| 8 | ALR | Ashover Light Railway | The ALR was a 60cm gauge line in Derbyshire, it ran from the Clay Cross Co. works at Clay Cross on the LMS main line to the works at Ashover, some 7 miles away. It was mainly a mineral carrier, with supplementary passenger service. Minerals included limestone, fluorspar, gritstone and later coal. It opened in 1924, being constructed and equipped using mainly surplus materials from WW1, and lasted until 1950 by which time it was worn out. | GB | TRAFFIC |
| 9 | ALRA | A L TRANSPORT CO | | | SCAC4 |
| 10 | ALRB | AC CONTAINER LINE GMBH | | | SCAC4 |
| 11 | ALRC | ALLRED TRUCKING CO INC | | | SCAC3 |
| 12 | ALRD | ALBANY REDI-MIX INC | | | SCAC4 |
| 13 | ALRE | ALL FREIGHT LINES INC | | | SCAC3 |
| 14 | ALRE | AUTO LINEAS REGIOMONTANAS SA DE CV | | | SCAC4 |
| 15 | ALRF | ALARCON TRUCKING | | | SCAC3 |
| 16 | ALRG | ALMAR TRUCKING | | | SCAC4 |
| 17 | ALRH | ALLERHEILIGEN, HARRY | | | SCAC3 |
| 18 | ALRI | ALL AROUND MOVING & STORAGE INC | | | SCAC3 |
| 19 | ALRJ | AC LTD | | | SCAC4 |
| 20 | ALRK | ALFIERI TRUCKING | | | SCAC3 |
| 21 | ALRL | ALLRED, LOREN E | | | SCAC3 |
| 22 | ALRL | ALL AMERICAN LOGISTICS LLC | | | SCAC4 |
| 23 | ALRM | ALLSTAR MOVING AND STORAGE INC | | | SCAC3 |
| 24 | ALRM | ALCAN TRADING LTD | | | SCAC4 |
| 25 | ALRO | ALERT TRUCKING CO | | | SCAC3 |
| 26 | ALRO | ALRO S.A. | | RO | VKM |
| 27 | ALRP | ALBA TRANSPORT | | | SCAC4 |
| 28 | ALRQ | ALLRITE MOVING CO | | | SCAC3 |
| 29 | ALRQ | ALL AMERICA RELOCATION INC | | | SCAC4 |
| 30 | ALRR | ALMARA DISTRIBUTORS INC | | | SCAC3 |
| 31 | ALRS | ALEXANDERS MOBILITY SERVICES | | | SCAC4 |
| 32 | ALRT | ALERT MOTOR FREIGHT INC | | | SCAC3 |
| 33 | ALRU | ALMAR CONTAINERS (EAST AFRICA) LTD | | ZA | BIC |
| 34 | ALRU | ALMAR CONTAINER INVESTMENTS INC | | | SCAC4 |
| 35 | ALRV | ALTERNATIVE TRANSPORTATION INC | | | SCAC4 |
| 36 | ALRW | AL-RAD INTERNATIONAL INC | | | SCAC3 |
| 37 | ALRW | ALDEN ROWING SHELLS LLC | | | SCAC4 |
| 38 | ALRX | A&R Leasing, L.L.C. | added 1/2001 | | NAKINA |
| 39 | ALRX | A&R Leasing, L.L.C. | added 1/2001 | | NRHS |
| 40 | ALRX | *ALABAMA RIVER PULP COMPANY | | | PWRC |
| 41 | ALRX | *A & R LEASING LLC | | | PWRC |
| 42 | ALRX | +ALPHA RAILROAD INDUSTRIES | | | PWRC |
| 43 | ALRX | A and R Leasing | | | RSRV |
| 44 | ALRX | ALPHA RAILROAD INDUSTRIES | | | SCAC4 |
| 45 | ALRY | ALJ TRANSPORTATION | | | SCAC4 |
| 46 | ALRZ | ALCOA REFINING | | | PWRC |
