| 1 | COA | Continental Air Lines, Inc. | IATA: CO, Callsign: Continental, IATA Prefix: 005, Name changed to Continental Airlines, Inc. | USA | AVCODES |
| 2 | COA | Continental Airlines, Inc. | IATA: CO, Callsign: Continental, IATA Prefix: 005, Merged into United Airlines UA/UAL. Name changed from Continental Air Lines, Inc. | USA | AVCODES |
| 3 | COA | Continental Airlines | IATA: CO | | ICAO1 |
| 4 | COA | Central Ry. Co. of Arkansas | 8/1920-7/1930 | | NAKINA |
| 5 | COA | Central Ry. Co. of Arkansas | 23-Jul | | NRHS |
| 6 | COA | CENTRAL RWY. CO. OF ARKANSAS | | | PWRC |
| 7 | COA | Continental Airlines | | USA | TRAFFIC |
| 8 | COAA | COASTAL TOWING & TRANSPORTATION CO, | | | SCAC3 |
| 9 | COAA | COASTAL EXPRESS INC | | | SCAC4 |
| 10 | COAB | COASTAL INC | | | SCAC3 |
| 11 | COAB | COASTAL INC | | | SCAC4 |
| 12 | COAC | COMBINED ATLANTIC CARRIERS | | | SCAC3 |
| 13 | COAC | COMBINED ATLANTIC CARRIERS | | | SCAC4 |
| 14 | COAC | Coast Cities | | US-NJ | TRAFFIC |
| 15 | COAD | COASTOL FIBERS INC | | | SCAC3 |
| 16 | COAF | COAST FREIGHT LINE | | | SCAC3 |
| 17 | COAG | COASTAL TRUCKING COMPANY | | | SCAC3 |
| 18 | COAH | COAST NURSERIES INC | | | SCAC4 |
| 19 | COAI | COASTAL MOVING COMPANY INC | | | SCAC3 |
| 20 | COAI | COASTAL MOVING COMPANY INC | | | SCAC4 |
| 21 | COAJ | COLUMBIA BASIN SPREADERS INC | | | SCAC4 |
| 22 | COAK | COAN TRANSPORTATION INC | | | SCAC4 |
| 23 | COAL | COALE TRUCK TRANSPORT INC | | | SCAC3 |
| 24 | COAL | CASCADE OIL CO | | | SCAC4 |
| 25 | COAL | Czech Coal services | | CZ | VKM |
| 26 | COAM | COASTAL MOVING & STORAGE, INC | | | SCAC3 |
| 27 | COAN | CONTAINER TRANSPORT INC | | | SCAC3 |
| 28 | COAN | CANO GUEVARA, DIANA | | | SCAC4 |
| 29 | COAO | COLORADO CONSOLIDATORS CORP | | | SCAC3 |
| 30 | COAO | CORO AUTOTRANSPORTES | | | SCAC4 |
| 31 | COAQ | COASTAL CARTAGE CO | | | SCAC3 |
| 32 | COAR | COAST REFRIGERATED TRUCKING CO INC | | | SCAC3 |
| 33 | COAS | COASTAL SUPPLY CO INC | | | SCAC4 |
| 34 | COASTER | Coaster | | USA | TRAFFIC |
| 35 | COAT | COATES-NORRELL MOTOR EXPRESS INC | | | SCAC3 |
| 36 | COAT | COATES-NORRELL MOTOR EXPRESS INC | | | SCAC4 |
| 37 | COAV | CAHALAN OIL COMPANY | | | SCAC4 |
| 38 | COAW | COASTAL TOWING & LIGHTERAGE CORP | | | SCAC3 |
| 39 | COAW | COLANGELO, ADAM | | | SCAC4 |
| 40 | COAX | Trinity Rail Management, Inc. | added 7/1997; 7/2000-7/2005 | | NAKINA |
| 41 | COAX | Transcisco Leasing Co. | added 7/1994; eliminated 7/1997 | | NAKINA |
| 42 | COAX | Transcisco Leasing Co. | added 7/94; eliminated 7/97 | | NRHS |
| 43 | COAX | Trinity Rail Management, Inc. | added 7/97; 7/2000 | | NRHS |
| 44 | COAX | *(MCHX) TRANSCISCO LEASING COMPANY | | | PWRC |
| 45 | COAX | +TRINITY RAIL MANAGEMENT INC | | | PWRC |
| 46 | COAX | Trinity Rail Management | | | RSRV |
| 47 | COAX | TRINITY RAIL MANAGEMENT | | | SCAC4 |
| 48 | COAZ | COLUMBIA ALUMINUM | | | PWRC |