| 1 | COB | Platinum Air Charter Executive Limited | Callsign: Cobham, Ceased operations | GB | AVCODES |
| 2 | COB | Cobra Jet Aviation | Callsign: Cobra Jet, | ET | AVCODES |
| 3 | COBA | COBANE AIR FREIGHT & EXPRESS INC | | | SCAC3 |
| 4 | COBB | COBB AUTO | | | SCAC4 |
| 5 | COBC | County Bus and Coach | London Country North East was bought by AJS and Parkdale in April 1988, then divided into two chunks in January 1989. County Bus and Coach was at Hertford, Harlow and Grays. | GB | TRAFFIC |
| 6 | COBD | CANNING PRODUCE INC | | | SCAC4 |
| 7 | COBE | CONTRACT BEVERAGES INC | | | SCAC3 |
| 8 | COBE | COBRA EXPRESS INC | | | SCAC4 |
| 9 | COBF | COBB FROZEN TRANSPORT INC | | | SCAC3 |
| 10 | COBG | COLBERG TRANSPORTATION | | | SCAC3 |
| 11 | COBG | COMPOSITES ONE LLC | | | SCAC4 |
| 12 | COBH | CORBIN TRUCKING CO INC | | | SCAC3 |
| 13 | COBI | COLORADO BEEF CO | | | SCAC3 |
| 14 | COBJ | COBB, JOSEPH E | | | SCAC3 |
| 15 | COBL | COBLE TRANSFER & STORAGE CO | | | SCAC3 |
| 16 | COBL | CONALTA ENTERPRISES CORP | | | SCAC4 |
| 17 | COBM | COLUMBUS CONSOLIDATED METRO | | | SCAC3 |
| 18 | COBN | COB-ASH INC | | | SCAC4 |
| 19 | COBO | COASTAL BEND DELIVERY SERVICE | | | SCAC3 |
| 20 | COBP | COLUMBIA BASIN CONTAINER CORP | | | SCAC3 |
| 21 | COBQ | COLIA BROTHERS | | | SCAC3 |
| 22 | COBQ | COLD STAR FREIGHT SYSTEMS INC | | | SCAC4 |
| 23 | COBRA | Cobelfret Rail NV | | BE | VKM |
| 24 | COBS | COBB-VANTRESS INCORPORATED | | | SCAC4 |
| 25 | COBT | COMMODITY OCEAN TRANSPORT CORP | | | SCAC3 |
| 26 | COBU | SONANGOL PESQUISA & PRODUCAO SA | | ANG | BIC |
| 27 | COBU | CONTAINER BUSINESS INC | | | SCAC3 |
| 28 | COBU | ELF EXPLORATION ANGOLA | | | SCAC4 |
| 29 | COBV | COBAM, ANTWERP, BELGIUM | | | SCAC3 |
| 30 | COBV | COBELFRET BULK CARRIERS NV | | | SCAC4 |
| 31 | COBW | CCBCC OPERATIONS LLC | | | SCAC4 |
| 32 | COBX | Cobre Mining Co. | added 1/1997; eliminated 7/1999; 7/2000 (not listed) | | NAKINA |
| 33 | COBX | Cobre Mining Co., Inc. | eliminated 1/1997 | | NAKINA |
| 34 | COBX | Union Tank Car Co. | added 10/1953; 7/1954-10/1957; eliminated 4/1959 | | NAKINA |
| 35 | COBX | Transit Co., Ltd. | 1/1952; eliminated 10/1953 | | NAKINA |
| 36 | COBX | Imperial Oil, Ltd. | 7/1935-1/1950 | | NAKINA |
| 37 | COBX | Imperial Oil, Ltd. | Apr-38 | | NRHS |
| 38 | COBX | Transit Co., Ltd. | 1/52; eliminated 10/53 | | NRHS |
| 39 | COBX | Union Tank Car Co. | added 10/53; 10/57 | | NRHS |
| 40 | COBX | Cobre Mining Co., Inc. | eliminated 1/97 | | NRHS |
| 41 | COBX | Cobre Mining Co. | added 1/97; eliminated 7/99; 7/2000 | | NRHS |
| 42 | COBX | *IMPERIAL OIL, LTD. | | | PWRC |
| 43 | COBX | *UNION TANK CAR CO. [TRANSIT CO. LTD.] | | | PWRC |
| 44 | COBX | *COBRE MINING COMPANY LIMITED | | | PWRC |
| 45 | COBX | Cobre Mining | | | RSRV |
| 46 | COBX | COBRA TRADING LLC | | | SCAC4 |
| 47 | COBY | COBB, TY | | | SCAC3 |
| 48 | COBZ | COORS BREWING | | | PWRC |
