| 1 | AA | American Airlines | ICAO: AAL, Callsign: American, IATA Prefix: 001, | USA | AVCODES |
| 2 | AA | Ann Arbor R.R. Co. | added 1/1989; 1/1994-7/2005 | | NAKINA |
| 3 | AA | Ann Arbor R.R., Michigan Interstate Ry. Co., Operator-in-Reorganization (W. Clark Durant, Ill, Trustee) | eliminated 1/1989 | | NAKINA |
| 4 | AA | Ann Arbor R.R., Michigan Interstate Ry. Co., Operator-in-Reorganization | added 4/1988 | | NAKINA |
| 5 | AA | Ann Arbor R.R. System, Michigan Interstate Ry. Co., Operator-in-Reorganization | eliminated 4/1988 | | NAKINA |
| 6 | AA | Ann Arbor R.R. Co. | eliminated 1/1978 | | NAKINA |
| 7 | AA | Ann Arbor R.R. System, Michigan Interstate Ry. Co., Operator | added 1/1978; 1/1980-1/1985 | | NAKINA |
| 8 | AA | Ann Arbor R.R. Co. (Owned and leased by the Michigan State Highway Commission) (Consolidated Rail Corp. designated operator) | added 7/1976 | | NAKINA |
| 9 | AA | Ann Arbor R.R. Co., John M. Chase, Jr., Trustee | eliminated 7/1976 | | NAKINA |
| 10 | AA | Ann Arbor R.R. Co. | 7/1932-1/1975 | | NAKINA |
| 11 | AA | Ann Arbor R.R. Co. | 4/38-1/75; eliminated 1/78 | | NRHS |
| 12 | AA | Ann Arbor R.R. System, Michigan Interstate Ry. Co., Operator | added 1/78; 1/80 | | NRHS |
| 13 | AA | Ann Arbor R.R. System, Michigan Interstate Ry. Co., Operator-in-Reorganization | eliminated 4/88 | | NRHS |
| 14 | AA | Ann Arbor R.R., Michigan Interstate Ry. Co., Operator-in-Reorganization | added 4/88 | | NRHS |
| 15 | AA | Ann Arbor R.R., Michigan Interstate Ry. Co., Operator-in-Reorganization (W. Clark Durant, Ill, Trustee) | eliminated 1/89 | | NRHS |
| 16 | AA | Ann Arbor R.R. Co. | added 1/89; 1/94-7/2000 | | NRHS |
| 17 | AA | ANN ARBOR RAILROAD | | | PWRC |
| 18 | AA | Ann Arbor Railroad | | | RSRV |
| 19 | AAA | Ansett Australia Holdings Limited | IATA: AN, Callsign: Ansett, IATA Prefix: 090, Ceased operations 04 March 2002. | AUS | AVCODES |
| 20 | AAA | Ansett Airlines of Australia | IATA: AN, Callsign: Austair, IATA Prefix: 090, Name changed to Ansett Australia Holdings Limited. | AUS | AVCODES |
| 21 | AAA | Avicon Aviation Consultants & Agents | | PK | AVCODES |
| 22 | AAA | Ansett Australia | IATA: AN | | ICAO1 |
| 23 | AAA | AAA WAREHOUSE CORPORATION (SHELL OIL PRODUCTS US) | | | PWRC |
| 24 | AAAB | AAA PAPER STOCK CO | | | SCAC3 |
| 25 | AAAB | AAA MOTORS | | | SCAC4 |
| 26 | AAAC | AAACTION TRANSPORTATION INC | | | SCAC4 |
| 27 | AAAD | A A A DELIVERY INC | | | SCAC3 |
| 28 | AAAD | A A A DELIVERY INC | | | SCAC4 |
| 29 | AAAE | AAA TRANSFER & STORAGE INC | | | SCAC3 |
| 30 | AAAG | AAA MOVING & STORAGE CO INC | | | SCAC3 |
| 31 | AAAG | ATC LOGISTICS INC | | | SCAC4 |
| 32 | AAAI | AAA RENT-A-CAR INC | | | SCAC3 |
| 33 | AaAJ | Aabenraa Amts Jernbaner | 1899 - 1926 | DK | jernbanen.dk |
| 34 | AAAJ | AAA VAN SERVICE INC | | | SCAC3 |
| 35 | AAAJ | Aabenraa Amts Jernbaner | 1899 - 1926; 1000 mm | DK | TRAFFIC |
| 36 | AAAL | AAA MOBILE HOME TRANSPORTATION INC | | | SCAC3 |
| 37 | AAAM | AAA MOTOR LINES | | | SCAC3 |
| 38 | AAAN | AAA MOVING AND STORAGE INC | | | SCAC3 |
| 39 | AAAO | AAA AIR EXPRESS | | | SCAC3 |
| 40 | AAAO | AAMODT INC | | | SCAC4 |
| 41 | AAAQ | A-A-ACHEN ADVANTAGE LIMO INC | | | SCAC3 |
| 42 | AAATV | Amicale des Anciens et Amis de la Traction Vapeur | | F | TRAFFIC |
| 43 | AAAU | ASIA CONTAINER LEASING CO LTD | | HK | BIC |
| 44 | AAAU | ARGHIRES CONTAINER SHIPPING CO. | | | SCAC3 |
| 45 | AAAU | ASIA CONTAINER LEASING CO LTD | | | SCAC4 |
| 46 | AAAV | AAA ASSOCIATES MOVING & STORAGE | | | SCAC3 |
| 47 | AAAW | AAA WALKER TRANSPORTATION SERVICES | | | SCAC4 |
| 48 | AAAX | Shell Oil Products US (Lubricants) | eliminated 7/2004 | | NAKINA |
| 49 | AAAX | AAA Warehouse Corp. | 1/1994 (not listed) | | NAKINA |
| 50 | AAAX | AAA Warehouse Corp. | Jan-94 | | NRHS |
| 51 | AAAX | AAA WAREHOUSE CORPORATION (SHELL OIL PRODUCTS US) | | | PWRC |
| 52 | AAAX | AAA Warehouse Corporation (Shell Oil) | | | RSRV |
| 53 | AAAY | AAAA FORWARDING INC | | | SCAC3 |
| 54 | AAB | Abelag Aviation NV | Callsign: ABG, Name changed to Abelag Aviation NV t/a Luxaviation Belgium. | B | AVCODES |
| 55 | AAB | Abelag Aviation NV t/a Luxaviation Belgium | Callsign: ABG, Name changed from Abelag Aviation NV. | B | AVCODES |
| 56 | AAB | Abelag Aviation | IATA: W9 | | ICAO1 |
| 57 | AABB | A-ABBOT VAN LINES | | | SCAC3 |
| 58 | AABB | AGENCIA ADUANAL BENITO BARRERA | | | SCAC4 |
| 59 | AABD | ANGOLA & BUFFALO DELIVERY | | | SCAC3 |
| 60 | AABE | A & B EXPRESS INC | | | SCAC3 |
| 61 | AABE | ABOVE AND BEYOND CARGO SERVICES INC | | | SCAC4 |
| 62 | AABF | A & A BROKERS INC | | | SCAC3 |
| 63 | AABG | AABLE LOGISTICS INC | | | SCAC4 |
| 64 | AABH | AABALON MOVING SERVICES | | | SCAC3 |
| 65 | AABH | AABALON MOVING SERVICES INC | | | SCAC4 |
| 66 | AABI | AABCO INC | | | SCAC3 |
| 67 | AABJ | AAA BROKERAGE | | | SCAC3 |
| 68 | AABJ | ALLIANCE CAPITAL | | | SCAC4 |
| 69 | AABK | ARGOS TRANSPORTATION BROKERS LLC | | | SCAC4 |
| 70 | AABL | A & B LEASING INC | | | SCAC3 |
| 71 | AABM | A & B MOVING & STORAGE INC | | | SCAC3 |
| 72 | AABO | AARON BROS | | | SCAC3 |
| 73 | AABO | A-ACTION BROKERS | | | SCAC4 |
| 74 | AABP | A & B TRANSPORTATION INC | | | SCAC3 |
| 75 | AABP | AIME FARMS | | | SCAC4 |
| 76 | AABQ | A & B TRANSPORT | | | SCAC3 |
| 77 | AABR | ANN ARBOR DISTRIBUTION INC | | | SCAC4 |
| 78 | AABS | A & B MOVING & STORAGE | | | SCAC3 |
| 79 | AABU | ALLTAINER VIETNAM CO, LTD | | VN | BIC |
| 80 | AABU | ALSTHOM ATLANTIC, ETABLISSEMENTS LE | | | SCAC3 |
| 81 | AABU | ALSTHOM ATLANTIC, ETABLISSEMENTS LE | | | SCAC4 |
| 82 | AABV | AAA BEAVER COUNTY MOTOR CLUB | | | SCAC3 |
| 83 | AABW | A & B TOWING INC | | | SCAC3 |
| 84 | AABW | ATLANTIC TRUCK LINES INC | | | SCAC4 |
| 85 | AABX | A B C RECYCLING LTD | | | SCAC4 |
| 86 | AABY | A A R BUS INC | | | SCAC3 |
| 87 | AAC | Army Air Corps | Callsign: Armyair, | GB | AVCODES |
| 88 | AAC | Army Air Corps | | | ICAO1 |
| 89 | AACA | ALLSTATE AIR CARGO INC | | | SCAC3 |
| 90 | AACB | AGASSIZ ALPACAS | | | SCAC4 |
| 91 | AACC | A & C CARRIERS INC | | | SCAC3 |
| 92 | AACC | ABC AUTO TRANSPORT INC | | | SCAC4 |
| 93 | AACD | AARID CONSOLIDATORS & FORWARDERS IN | | | SCAC3 |
| 94 | AACD | ASSINIBOIA AIR CONDITIONING DIST LT | | | SCAC4 |
| 95 | AACE | ALASKA CARGO EXPRESS | | | SCAC3 |
| 96 | AACF | ACME AIR CARGO INC | | | SCAC3 |
| 97 | AACG | AGAPE AIR CARGO/GROUND EXPRESS | | | SCAC3 |
| 98 | AACH | Aachener Straßenbahn und Energieversorgungs AG | Real: ASEAG, City: Aachen | D | TRAFFIC |
| 99 | AACH | Zakłady Azotowe Chorzów S.A. | | PL | VKM |
| 100 | AACI | A-ACTIVE MOVERS INC | | | SCAC3 |
