| 13701 | ASR | +ALLEGHENY SOUTHERN RAILROAD | | | PWRC |
| 13702 | ASR | Allegheny Southern Railroad | | | RSRV |
| 13703 | ASR | ALLEGHENY SOUTHERN RAILROAD INC | | | SCAC4 |
| 13704 | ASRA | ASR SERVICES | | | SCAC4 |
| 13705 | ASRB | ALLIED SHIPPERS AND RECEIVERS ASSOC | | | SCAC3 |
| 13706 | ASRB | ADAMS TRUCKING INC | | | SCAC4 |
| 13707 | ASRC | ASRCA TRANSPORT INC | | | SCAC3 |
| 13708 | ASRD | ANT SEARIDERS LIMITED | | | SCAC3 |
| 13709 | ASRE | AIR STAR EXPRESS TRUCKING | | | SCAC4 |
| 13710 | ASRF | ASTRON FORWARDING COMPANY | | | SCAC3 |
| 13711 | ASRF | ALL SERVICES 2005 | | | SCAC4 |
| 13712 | ASRG | ASHBY, RONALD | | | SCAC3 |
| 13713 | ASRH | ASSOCIATED RIGGING & HAULING CORP | | | SCAC3 |
| 13714 | ASRH | AUTOTRANSPORTES 3 HERMANOS | | | SCAC4 |
| 13715 | ASRI | ARMITAGE MOTOR SERVICE | | | SCAC3 |
| 13716 | ASRI | ADVANCED STEEL RECOVERY INC | | | SCAC4 |
| 13717 | ASRJ | ASHRON TRANSPORT INC | | | SCAC4 |
| 13718 | ASRK | ASTRO TRUCKING | | | SCAC3 |
| 13719 | ASRK | ALLSTAR TRUCKING INC | | | SCAC4 |
| 13720 | ASRM | ASTORIA READY-MIX INC | | | SCAC3 |
| 13721 | ASRM | AUSTRAL SHIPPING LIMITED | | | SCAC4 |
| 13722 | ASRN | A & S TRANSPORT INC | | | SCAC3 |
| 13723 | ASRN | ADENA SPRINGS | | | SCAC4 |
| 13724 | ASRO | AUTOTRANSPORTES SANTA ROSA S A DE C | | | SCAC4 |
| 13725 | ASRQ | ALL SERVICES HEAVY TRANSPORT | | | SCAC3 |
| 13726 | ASRR | AUGUSTA & SUMMERVILLE RAILROAD CO. | | | PWRC |
| 13727 | ASRR | ALL STAR MOVERS | | | SCAC3 |
| 13728 | ASRR | Adirondack Scenic Railroad | Real: ASR | USA | TRAFFIC |
| 13729 | ASRS | ASMUSSEN RACING STABLES | | | SCAC3 |
| 13730 | ASRT | ALL STAR FREIGHT | | | SCAC3 |
| 13731 | ASRT | ALL SERVICE TRANSPORT | | | SCAC4 |
| 13732 | ASRU | ARMED FORCES OF THE SLOVAK REPUBLIC | | SK | BIC |
| 13733 | ASRU | ARAMCO SERVICES CO. | | | SCAC3 |
| 13734 | ASRU | GENERALNY STAB ARMADY | | | SCAC4 |
| 13735 | ASRW | Allegheny Southern Ry. | added 1/1983; eliminated 1/1985 | | NAKINA |
| 13736 | ASRW | Allegheny Southern Ry. | added 1/83; eliminated 1/85 | | NRHS |
| 13737 | ASRW | ALLEGHENY SOUTHERN RAILWAY | | | PWRC |
| 13738 | ASRW | Allegheny Southern Railway | | | RSRV |
| 13739 | ASRX | Domino Sugar Corp. | added 10/1992; 1/1994-7/2005 | | NAKINA |
| 13740 | ASRX | Amstar Sugar Co. | added 4/1989; eliminated 10/1992 | | NAKINA |
| 13741 | ASRX | Amstar Corp. | added 1/1971; 1/1975-1/1980; eliminated 4/1989 | | NAKINA |
| 13742 | ASRX | American Sugar Co. | added 10/1963; 7/1965-4/1970; eliminated 1/1971 | | NAKINA |
| 13743 | ASRX | American Sugar Refining Co. | 8/1920-4/1961; eliminated 10/1963 | | NAKINA |
| 13744 | ASRX | American Sugar Refining Co. | 4/38-4/61 | | NRHS |
| 13745 | ASRX | American Sugar Co. | 7/65-4/70 | | NRHS |
| 13746 | ASRX | Amstar Corp. | 1/75-1/80; eliminated 4/89 | | NRHS |
| 13747 | ASRX | Amstar Sugar Co. | added 4/89; eliminated 10/92 | | NRHS |
| 13748 | ASRX | Domino Sugar Corp. | added 10/92; 1/94-7/2000 | | NRHS |
| 13749 | ASRX | *ARKANSAS SHORTLINE RAILROAD | | | PWRC |
| 13750 | ASRX | +DOMINO SUGAR CORP. [AMERICAN SUGAR REFINING CO.; AMSTAR CORP.] | | | PWRC |
| 13751 | ASRX | Amstar Corporation (Domino Sugar) | | | RSRV |
| 13752 | ASRX | AMERICAN SUGAR CO | | | SCAC3 |
| 13753 | ASRX | DOMINO SUGAR COMPANY | | | SCAC4 |
| 13754 | ASRY | Ashland Ry., Inc. | added 7/1986; eliminated 10/1987; eliminated 1/1992; added 1/1994; 7/2000-7/2005 | | NAKINA |
| 13755 | ASRY | Ashland Ry., Inc. | added 7/86; eliminated 10/87; eliminated 1/92; added 1/94; 7/2000 | | NRHS |
| 13756 | ASRY | ASHLAND RAILWAY, INC. (OHIO) | | | PWRC |
| 13757 | ASRY | Ashland Railway | | | RSRV |
| 13758 | ASRY | ASHLAND RAILWAY CO | | | SCAC3 |
| 13759 | ASRZ | AGRI/SHARE COOPERATIVE | | | PWRC |
| 13760 | ASRZ | Agri/Share Cooperative | | | RSRV |
| 13761 | ASRZ | AGRI/SHARE COOPERATIVE | | | SCAC4 |
| 13762 | ASS | Air Class, S.A. de C.V. | Callsign: Air Class, | MEX | AVCODES |
| 13763 | ASS | Air Sarnia | Callsign: Dodo, | GB | AVCODES |
| 13764 | ASS | Air Class, S.A. de C.V. | | | ICAO1 |
| 13765 | ASSB | ASSOCIATED BOAT TRANSPORT | | | SCAC3 |
| 13766 | ASSB | ASSOCIATED BOAT TRANSPORT | | | SCAC4 |
| 13767 | ASSC | ASSOCIATED CARTAGE COMPANY, INC | | | SCAC3 |
| 13768 | ASSC | ASSOCIATED CARTAGE COMPANY, INC | | | SCAC4 |
| 13769 | ASSE | ASSOCIATED TRANSPORTATION SERVICES | | | SCAC3 |
| 13770 | ASSE | ASSA PROVIDENCE | | | SCAC4 |
| 13771 | ASSG | ASSOCIATED MANAGEMENT GROUP INC | | | SCAC3 |
| 13772 | ASSH | AMERICAN STEAMSHIP COMPANY | | | SCAC3 |
| 13773 | ASSH | AMERICAN STEAMSHIP COMPANY | | | SCAC4 |
| 13774 | ASSI | ATLANTIC STAR LIMOUSINE SERVICE INC | | | SCAC3 |
| 13775 | ASSJ | ASIAN SHIPPING. LTD. | | | SCAC3 |
| 13776 | ASSK | ARCTIC SEAL SHIPPING COMPANY | | | SCAC3 |
| 13777 | ASSK | ALSTON AND SON TRUCKING | | | SCAC4 |
| 13778 | ASSL | ALASSIA STEAMSHIP CO LTD | | | SCAC3 |
| 13779 | ASSM | ATS SPECIALIZED INC | | | SCAC4 |
| 13780 | ASSO | ASSOCIATE TRANSFER CO | | | SCAC3 |
| 13781 | ASSO | ATLAS SERVICE STATION LLC | | | SCAC4 |
| 13782 | ASSOCB | Associated Bus Company, NJ | | USA | TRAFFIC |
| 13783 | ASSP | ASPILOS SHIPPING CO LTD | | | SCAC3 |
| 13784 | ASSQ | ANDERSON SPOTTING SERVICE | | | SCAC3 |
| 13785 | ASSQ | ASTRO SHIPMANAGEMENT INC | | | SCAC4 |
| 13786 | ASSR | ASSOCIATED TRANSPORT | | | SCAC3 |
| 13787 | ASSR | ASSOCIATED TRANSPORT | | | SCAC4 |
| 13788 | ASST | AIR SEVEN (7) SEAS TRANSPORT LOGIST | | | SCAC4 |
| 13789 | ASSU | SOCIETA AUTOTRASPORTI SPECIALI S.P.A | | I | BIC |
| 13790 | ASSU | S A S SOCIETA | | | SCAC4 |
| 13791 | AST | Air Astana | IATA: 4L, Callsign: Astanaline, ICAO designator changed to KZR. IATA Designator changed from LQ* | KZ | AVCODES |
| 13792 | AST | Aerolineas Del Oeste, S.A. de C.V. | Callsign: Aeroeste, | MEX | AVCODES |
| 13793 | AST | Air Astana | IATA: LQ, IATA Designator changed to 4L | KZ | AVCODES |
| 13794 | AST | Astro Airways Corp. | Callsign: Astro-Air, | USA | AVCODES |
| 13795 | AST | Air Sarina AG | Callsign: Air Sarina, | CH | AVCODES |
| 13796 | AST | Thai Summer Airways Company Limited | Callsign: Thai Summer, | T | AVCODES |
| 13797 | AST | Aerlineas Del Oeste | | | ICAO1 |
| 13798 | AST | AMERICANSTAR TOURS INC | | | SCAC4 |
| 13799 | ASTA | ASTER TRUCKING CORP | | | SCAC3 |
| 13800 | ASTA | ALISTA MARITIME INC | | | SCAC4 |
