| 7301 | ALA | ALABAMA & GULF COAST RAILWAY | | | PWRC |
| 7302 | ALAA | ALAMO AMBULANCE SERVICE INC | | | SCAC3 |
| 7303 | ALAA | ALAMO AMBULANCE SERVICE INC | | | SCAC4 |
| 7304 | ALAB | Alabama R.R. Co. | added 7/1993; 1/1994-7/2005 | | NAKINA |
| 7305 | ALAB | Alabama R.R. Co. | added 7/93; 1/94-7/2000 | | NRHS |
| 7306 | ALAB | ALABAMA RAILROAD COMPANY, INC. | | | PWRC |
| 7307 | ALAB | Alabama Railroad | | | RSRV |
| 7308 | ALAB | ALABAMA RAILROAD CO INC | | | SCAC3 |
| 7309 | ALAB | ALABAMA RAILROAD CO INC | | | SCAC4 |
| 7310 | ALAB | Alabama Railroad | | USA | TRAFFIC |
| 7311 | ALAC | ALASKA TRANSPORT | | | SCAC3 |
| 7312 | ALAD | ALADIN VAN LINES, INCORPORATED | | | SCAC3 |
| 7313 | ALAD | ALANIS RIVERA, JOSUE DAVID | | | SCAC4 |
| 7314 | ALAF | ALABAMA FREIGHT INC | | | SCAC3 |
| 7315 | ALAH | ALLAIRE TRANSPORT | | | SCAC3 |
| 7316 | ALAI | ALL AMERICAN CARTAGE | | | SCAC3 |
| 7317 | ALAJ | ALADDIN INC | | | SCAC3 |
| 7318 | ALAK | ALASKA ORIENT VAN SERVICE, INC | | | SCAC3 |
| 7319 | ALAL | ATLANTA AIR TRANSPORTATION INC | | | SCAC3 |
| 7320 | ALAL | ATLANTA AIR TRANSPORTATION INC | | | SCAC4 |
| 7321 | ALAM | ALAMO BUS LINES, INC | | | SCAC3 |
| 7322 | ALAM | ALAMPI, ANTHONY P | | | SCAC4 |
| 7323 | ALAN | ALAN MOTOR LINES INC | | | SCAC3 |
| 7324 | ALAND | ARBOTEC GmbH | | DE | VKM |
| 7325 | ALAP | AIR LIQUIDE AMERICA LP | | | SCAC4 |
| 7326 | ALAQ | ALL AMERICAN WAREHOUSE | | | SCAC3 |
| 7327 | ALAQ | ARROW LINE ACQUISITION LLC | | | SCAC4 |
| 7328 | ALAR | ALLARD EXCAVATING | | | SCAC3 |
| 7329 | ALAS | ALASKA TERMINALS INC | | | SCAC3 |
| 7330 | ALAS | ALASKA TERMINALS INC | | | SCAC4 |
| 7331 | ALAT | ATLANTIS EXPRESS INC | | | SCAC3 |
| 7332 | ALAT | ALASAN TRUCKING | | | SCAC4 |
| 7333 | ALAU | JSC EKOPET | | RUS | BIC |
| 7334 | ALAU | ALUMINUM COMPANY OF AMERICA | | | SCAC3 |
| 7335 | ALAU | LIMITED LIABILITY COMPANY EKOPET | | | SCAC4 |
| 7336 | ALAX | Equistar Chemicals, LP | added 4/1998; 7/2000-7/2005 | | NAKINA |
| 7337 | ALAX | Lyondell Petrochemical Co. | added 4/1996; eliminated 4/1998 | | NAKINA |
| 7338 | ALAX | Occidental Chemical Corp. | added 1/1992; 1/1994; eliminated 10/1995 | | NAKINA |
| 7339 | ALAX | Occidental Chemical Corp., Alathon Polymers Division | added 7/1990; eliminated 1/1992 | | NAKINA |
| 7340 | ALAX | Oxy Petrochemicals Inc. | added 1/1990; eliminated 7/1990 | | NAKINA |
| 7341 | ALAX | Cain Chemical Inc. | added 4/1988; eliminated 1/1990 | | NAKINA |
| 7342 | ALAX | Alabama Metalurgical Corp. | added 7/1974; 1/1975-1/1980; eliminated 1/1982 | | NAKINA |
| 7343 | ALAX | Union Oil Co. of California | added 1/1960; 4/1961; eliminated 7/1962 | | NAKINA |
| 7344 | ALAX | Alaska Asphalt Co. | added 4/1959; eliminated 7/1959 | | NAKINA |
| 7345 | ALAX | Alaska Asphalt Co. | eliminated 7/59 | | NRHS |
| 7346 | ALAX | Union Oil Co. of California | added 1/60; 4/61 | | NRHS |
| 7347 | ALAX | Alabama Metalurgical Corp. | added 7/74; 1/75-1/80; eliminated 1/82 | | NRHS |
| 7348 | ALAX | Cain Chemical Inc. | added 4/88; eliminated 1/90 | | NRHS |
| 7349 | ALAX | Oxy Petrochemicals Inc. | added 1/90; eliminated 7/90 | | NRHS |
| 7350 | ALAX | Occidental Chemical Corp., Alathon Polymers Division | added 7/90; eliminated 1/92 | | NRHS |
| 7351 | ALAX | Occidental Chemical Corp. | added 1/92; 1/94; eliminated 10/95 | | NRHS |
| 7352 | ALAX | Lyondell Petrochemical Co. | added 4/96; eliminated 4/98 | | NRHS |
| 7353 | ALAX | Equistar Chemicals, LP | added 4/98; 7/2000 | | NRHS |
| 7354 | ALAX | *ALASKA ASPHALT CO. | | | PWRC |
| 7355 | ALAX | *UNION OIL COMPANY OF CALIFORNIA | | | PWRC |
| 7356 | ALAX | *ALABAMA METALLURGICAL CORP. | | | PWRC |
| 7357 | ALAX | *CAIN CHEMICAL INC. | | | PWRC |
| 7358 | ALAX | +EQUISTAR CHEMICALS [OCCIDENTAL CHEMICAL CORP., ALATHON POLYMERS DIV.; OXY PETROCHEMICALS; LYONDELL PETROCHEMICAL]) | | | PWRC |
| 7359 | ALAX | Alaska Asphalt (Equistar Chemicals) | | | RSRV |
| 7360 | ALAX | EQUISTAR CHEMICALS LP | | | SCAC4 |
| 7361 | ALAY | A L A DELIVERY CORP | | | SCAC3 |
| 7362 | ALAY | ALACAR LOGISTICS LLC | | | SCAC4 |
| 7363 | ALB | Aero Albatros | Callsign: Albatros, | MEX | AVCODES |
| 7364 | ALB | Aero Albatros | | | ICAO1 |
| 7365 | ALBA | ACCELLAB INC | | | SCAC4 |
| 7366 | ALBA | Alba Volán | | H | TRAFFIC |
| 7367 | ALBB | ALBIN, BOB TRUCKING | | | SCAC4 |
| 7368 | ALBC | ALBINA FUEL CO | | | SCAC3 |
| 7369 | ALBC | ALBINA FUEL CO | | | SCAC4 |
| 7370 | ALBD | ALL ABOARD TRANSPORT INC | | | SCAC4 |
| 7371 | ALBE | ALBEMARLE EUROPE SPRL | | BE | VKM |
| 7372 | ALBF | ALBERT BROS INC | | | SCAC3 |
| 7373 | ALBF | ALL CITY TRANSPORT LTD | | | SCAC4 |
| 7374 | ALBH | ALBRECHT BROS | | | SCAC3 |
| 7375 | ALBH | AL TRANS INC | | | SCAC4 |
| 7376 | ALBI | ALBERT MOVING & STORAGE | | | SCAC3 |
| 7377 | ALBI | ALBERT MOVING & STORAGE | | | SCAC4 |
| 7378 | ALBJ | ALBATRANS INC | | | SCAC4 |
| 7379 | ALBL | ALBANEST TRANSPORT INC | | | SCAC3 |
| 7380 | ALBM | ALBUQUERQUE MOVING & STORAGE COMPAN | | | SCAC3 |
| 7381 | ALBO | ALBIN MOTOR TRANSPORT | | | SCAC3 |
| 7382 | ALBO | ALBORES HERNANDEZ, ANTONIO | | | SCAC4 |
| 7383 | ALBO | Alberdingk Boley GmbH | | DE | VKM |
| 7384 | ALBP | ALCO TRANSPORT LLC | | | SCAC4 |
| 7385 | ALBQ | ALBENA SHIPPING LIMITED | | | SCAC3 |
| 7386 | ALBR | ALBANY BRIDGE RAILROAD | | | PWRC |
| 7387 | ALBS | ALABAMA BUSES UNLIMITED INC | | | SCAC4 |
| 7388 | ALBT | ALBRIGHT, M L & SONS | | | SCAC3 |
| 7389 | ALBT | ALBINA TRANSYSTEM INC | | | SCAC4 |
| 7390 | ALBU | ALBLAS INT. TRANSPORT BV | | NL | BIC |
| 7391 | ALBU | ALBACORE LEASING | | | SCAC3 |
| 7392 | ALBU | ALBLAS INT TRANSPORT BV | | | SCAC4 |
| 7393 | ALBV | ACTION LOGISTICS COMPANY | | | SCAC4 |
| 7394 | ALBW | ALABAMA FARM BUREAU SERVICES INC | | | SCAC3 |
| 7395 | ALBX | Albert City Elevator | added 4/1980; 1/1985; eliminated 10/1989 | | NAKINA |
| 7396 | ALBX | Albert City Elevator | added 4/80; eliminated 10/89 | | NRHS |
| 7397 | ALBX | ALBERT CITY ELEVATOR | | | PWRC |
| 7398 | ALBX | Albert City Elevator | | | RSRV |
| 7399 | ALBY | ALBANY PORT RAILROAD | | | PWRC |
| 7400 | ALBZ | ALOIS BOX | | | PWRC |
