| 1 | COI | Absolute Flight Services (Pty) Ltd | Callsign: Contrail, ICAO designator changed from FYB | ZA | AVCODES |
| 2 | COI | Coinspectra Aviacion, C.A. | Callsign: Coaviation, | YV | AVCODES |
| 3 | COIA | CONTINENTAL MOVING | | | SCAC3 |
| 4 | COIA | CONDOR AIR TRANSPORT LTD | | | SCAC4 |
| 5 | COIB | CORRIDOR INTERURBAN TRANSPORT CORP | | | SCAC3 |
| 6 | COIC | CARY OIL CO INC | | | SCAC3 |
| 7 | COIC | COSIC | | | SCAC4 |
| 8 | COID | COIN DEVICES CORPORATION | | | SCAC3 |
| 9 | COIF | CHARLIES OIL CO INC | | | SCAC4 |
| 10 | COIG | CARROLL OIL COMPANY INC | | | SCAC3 |
| 11 | COIG | CHANDLER OIL LLC | | | SCAC4 |
| 12 | COIH | COLORADO CARRIERS INC | | | SCAC3 |
| 13 | COIH | CHINA ONE IMPORTS | | | SCAC4 |
| 14 | COIJ | CONTINENTAL CARRIERS INC | | | SCAC3 |
| 15 | COIK | COATICOOK EXPRESS INC | | | SCAC3 |
| 16 | COIK | CONZEMIUS OIL INC | | | SCAC4 |
| 17 | COIL | COCHOIS (INTERNATIONAL) LTD | | | SCAC3 |
| 18 | COIL | COLUMBIA INTERMODAL LLC | | | SCAC4 |
| 19 | COIM | CONTINENTAL MOVERS | | | SCAC3 |
| 20 | COIO | COHAGEN TRANSFER & STORAGE CO INC | | | SCAC3 |
| 21 | COIP | COLLINS, PAUL H | | | SCAC3 |
| 22 | COIP | COLLINS, PAUL H | | | SCAC4 |
| 23 | COIQ | CENTRAL OIL COMPANY | | | SCAC3 |
| 24 | COIR | CONTRACT CARRIERS INC | | | SCAC3 |
| 25 | COIR | COAST TO COAST CARRIERS INC | | | SCAC4 |
| 26 | COIS | COASTAL ENVIRONMENTAL SYSTEMS INC | | | SCAC3 |
| 27 | COIS | COIL CARRIERS INC | | | SCAC4 |
| 28 | COIT | COMMUNITY ASPHALT CORPORATION | | | SCAC4 |
| 29 | COIU | RICH GLORY (HONG KONG) LIMITED | | PRC | BIC |
| 30 | COIU | CONVOY INTERCONTINENTAL CONTAINER | | | SCAC3 |
| 31 | COIV | CONTINENTAL MOVERS INC | | | SCAC3 |
| 32 | COIW | COMMERCIAL WAREHOUSE CO | | | SCAC3 |
| 33 | COIW | CASE COURIERS DFW | | | SCAC4 |
| 34 | COIY | CARL OIL INC | | | SCAC3 |
| 35 | COIY | CDS OVERSEAS INC LOS ANGELES | | | SCAC4 |
