| 8101 | ALSP | ALPHA SERVICES INC | | | SCAC4 |
| 8102 | ALSQ | ALS TOWING SERVICE | | | SCAC3 |
| 8103 | ALSR | ALLSTAR MOVING & STORAGE INC | | | SCAC3 |
| 8104 | ALSS | ALCOA STEAMSHIP CO INC | | | PWRC |
| 8105 | ALSS | ALCOA STEAMSHIP CO., INC. | | | SCAC3 |
| 8106 | ALSS | ALCOA STEAMSHIP CO., INC. | | | SCAC4 |
| 8107 | ALST | ALLEGHENY LUDLUM STEEL | | | PWRC |
| 8108 | ALSTOM | Alstom Lokomotiven Service GmbH | Real: ALS, In 2002 Alstom took over the DBAG Stendal works. ALS leases/hires locomotives to operators, mainly rebuilt DBAG class 202. | D | TRAFFIC |
| 8109 | ALSU | AIR LIQUIDE GAS AB | | S | BIC |
| 8110 | ALSU | ALFAX AB | | | SCAC3 |
| 8111 | ALSU | AIR LIQUIDE GAS AB | | | SCAC4 |
| 8112 | ALSV | ALS VAN LINE SERVICES INC | | | SCAC4 |
| 8113 | ALSW | ALL TRANS SERVICES INC | | | SCAC4 |
| 8114 | ALSX | Albis Canada, Inc. | added 7/1989; eliminated 4/1993; 1/1994 (not listed); added 10/1996; eliminated 4/97; 7/2000-7/2005 (not listed) | | NAKINA |
| 8115 | ALSX | Atlantic Live Stock Express, Inc. | 7/1935-7/1937 | | NAKINA |
| 8116 | ALSX | Albis Canada, Inc. | added 7/89; eliminated 4/93; 1/94; added 10/96; eliminated 4/97; 7/2000 | | NRHS |
| 8117 | ALSX | *ATLANTIC LIVE STOCK EXPRESS, INC. | | | PWRC |
| 8118 | ALSX | +ALBIS CANADA, INC. | | | PWRC |
| 8119 | ALSX | Albis Canada | | | RSRV |
| 8120 | ALSX | ALBIS CANADA, INC. | | | SCAC4 |
| 8121 | ALSY | AMERICAN LEASING SYSTEMS LLC | | | SCAC4 |
| 8122 | ALT | SBS Aircraft | IATA: XE, Callsign: Green-Craft, | KZ | AVCODES |
| 8123 | ALT | Airlake Terminal Railway Co. | eliminated 1/2008 | | NAKINA |
| 8124 | ALT | AIRLAKE TERMINAL RAILWAY COMPANY | | | PWRC |
| 8125 | ALT | Airlake Terminal Railway | | | RSRV |
| 8126 | ALT | AIRLAKE TERMINAL RAILWAY COMPANY | | | SCAC4 |
| 8127 | ALTA | Roider GmbH | | DE | VKM |
| 8128 | ALTB | ALLIANCE TRANSPORTATION INC | | | SCAC3 |
| 8129 | ALTD | ALTURA FARMS LTD | | | SCAC3 |
| 8130 | ALTE | ALTIER TRUCKING COMPANY | | | SCAC3 |
| 8131 | ALTE | ALL TYPES EXPEDITING & DELIVERY SVS | | | SCAC4 |
| 8132 | ALTF | ALLTEX TRANSPORT | | | SCAC4 |
| 8133 | ALTH | ATLANTIC COACH & TRANSPORTATION INC | | | SCAC4 |
| 8134 | ALTI | ALT SERVICES INC | | | SCAC4 |
| 8135 | ALTK | ALLSTATE TRUCKING, INC | | | SCAC3 |
| 8136 | ALTK | ALLIANCE TANK LINE INC | | | SCAC4 |
| 8137 | ALTL | ALL COAST INTERMODAL SERVICES INC | | | SCAC4 |
| 8138 | ALTM | ALTIMAX COURIER LIMITED | | | SCAC4 |
| 8139 | ALTM | Autocars Altmann | | L | TRAFFIC |
| 8140 | ALTMARK | Altmarktrans Stendal | | D | TRAFFIC |
| 8141 | ALTO | ALATORRES TRANSPORTATION SERVICE | | | SCAC3 |
| 8142 | ALTO | ALTA TRANSPORTATION INC | | | SCAC4 |
| 8143 | ALTON | Chicago and Alton Railroad | | USA | TRAFFIC |
| 8144 | ALTP | ALLTOP, RUSSELL E TRANSFER | | | SCAC3 |
| 8145 | ALTQ | ALL AREA TRANSIT INC | | | SCAC3 |
| 8146 | ALTQ | ALLTECH INC | | | SCAC4 |
| 8147 | ALTR | ALTER TRUCKING AND TERMINAL CORPORA | | | SCAC3 |
| 8148 | ALTR | ATTS | | | SCAC4 |
| 8149 | ALTRA | Altrans Sp. z o.o. | | PL | VKM |
| 8150 | ALTS | ALASKA TRANSFER & STORAGE, INC | | | SCAC3 |
| 8151 | ALTT | ALTERMAN TRANSPORT LINES, INC | | | SCAC3 |
| 8152 | ALTT | ALT TRUCKING INC | | | SCAC4 |
| 8153 | ALTU | VTG TANKTAINER ASSETS GMBH | | D | BIC |
| 8154 | ALTU | VTG VEREINIGTE TANKLAGER U TRANSPORTMITTEL GMBH | | | PWRC |
| 8155 | ALTU | VTG Deutschland | | | RSRV |
| 8156 | ALTU | ALGECO | | | SCAC3 |
| 8157 | ALTU | VTG AG | | | SCAC4 |
| 8158 | ALTV | ALTERNATIVE MOVING SYSTEMS LTD | | | SCAC3 |
| 8159 | ALTW | ALLIED TOWING CORP | | | SCAC3 |
| 8160 | ALTW | AUTO LINEA SANTA ELENA | | | SCAC4 |
| 8161 | ALTX | Alter Trading Corp. | added 10/2006 | | NAKINA |
| 8162 | ALTX | Atlas Tank Line Co., Inc. | 7/1930-7/1932 | | NAKINA |
| 8163 | ALTX | Southern Illinois Railcar Co. | added 10/1994; 7/2000-7/2005; eliminated 10/2006 | | NAKINA |
| 8164 | ALTX | Southern Illinois Railcar Co. | added 10/94; 7/2000 | | NRHS |
| 8165 | ALTX | *ATLAS TANK LINE CO. INC. | | | PWRC |
| 8166 | ALTX | +ALTER TRADING CO. [SOUTHERN ILLINOIS RAILCAR INC.;(ACL) ARMOUR TANK LINES] | | | PWRC |
| 8167 | ALTX | Alter Trading (Southern Illinois Railcar) | | | RSRV |
| 8168 | ALTX | ALTER TRADING CORPORATION | | | SCAC4 |
| 8169 | ALTY | ALAMO TRANSFORMER SUPPLY COMPANY | | | SCAC4 |
| 8170 | ALU | Alpine Luft-Transport AG | Callsign: Alag, | CH | AVCODES |
| 8171 | ALU | Air Luxor STP | IATA: C2, Callsign: Luxorjet, | STP | AVCODES |
| 8172 | ALU | Air Luxor STP | | | ICAO1 |
| 8173 | ALU | Alcolu R.R. Co. | 8/1920-7/1935 | | NAKINA |
| 8174 | ALU | Alcolu R.R. Co. | 23-Jul | | NRHS |
| 8175 | ALU | ALCOLU RAILROAD | | | PWRC |
| 8176 | ALU | Alcolu Railroad | | | RSRV |
| 8177 | ALU | ALUSTA S.A. | | PL | VKM |
| 8178 | ALUA | ALUMINA TRANSPORT CORP | | | SCAC3 |
| 8179 | ALUB | ALMADEN LUMBER & TRUCKING CO | | | SCAC3 |
| 8180 | ALUC | ATLANTIC TRUCKING CO INC | | | SCAC3 |
| 8181 | ALUC | ATLANTIC TRUCKING CO INC | | | SCAC4 |
| 8182 | ALUD | AMERICAN LAND TRANSPORT INC | | | SCAC4 |
| 8183 | ALUE | ALUMINUM EXPRESS INC | | | SCAC3 |
| 8184 | ALUF | A & L HOME FUEL LLC | | | SCAC4 |
| 8185 | ALUG | ALLEN LUMBER & GRAIN SALES INC | | | SCAC3 |
| 8186 | ALUH | ALUCHEM TRANSPORTATION INC | | | SCAC3 |
| 8187 | ALUH | A & L TRANSPORTATION LLC | | | SCAC4 |
| 8188 | ALUI | ALLEN UNITED INC | | | SCAC3 |
| 8189 | ALUI | ALTMAN TRUCKING CO | | | SCAC4 |
| 8190 | ALUJ | ALLIED LOGISTICS INC | | | SCAC4 |
| 8191 | ALUK | ALLSTATES TRUCKING, INC | | | SCAC3 |
| 8192 | ALUK | ALLSTATES TRUCKING INC | | | SCAC4 |
| 8193 | ALUL | AIRPORT LIMOUSINE SERVICE | | | SCAC3 |
| 8194 | ALUL | ATL TRUCKING LTD | | | SCAC4 |
| 8195 | ALUM | ALUM ROCK CHEESE (DIV OF BEATRICE F | | | SCAC3 |
| 8196 | ALUN | A-L CONSTRUCTION CO LTD | | | SCAC4 |
| 8197 | ALUO | ALUMNI INTERNATIONAL INC | | | SCAC3 |
| 8198 | ALUQ | ALLEN TRUCKING | | | SCAC4 |
| 8199 | ALUR | ALUMINUM MOLD & PATTERN LTD | | | SCAC4 |
| 8200 | ALUT | ALUMARK TRANSPORT | | | SCAC3 |
