| 12101 | COGY | COMANDO LOGISTICS INC | | | SCAC4 |
| 12102 | COH | Coltishall FTU | Callsign: Colt, | GB | AVCODES |
| 12103 | COH | Coltishall Flying Training Unit | | | ICAO1 |
| 12104 | COHA | COACH LOGISTICS INCORPORATED | | | SCAC4 |
| 12105 | COHB | CORNETT, HERBERT H | | | SCAC3 |
| 12106 | COHC | COHENS CONTAINER CORP | | | SCAC3 |
| 12107 | COHD | COLE HERSEE CO | | | SCAC3 |
| 12108 | COHE | COHO TRANSPORT | | | SCAC3 |
| 12109 | COHE | COHESION FREIGHT (HK) LIMITED | | | SCAC4 |
| 12110 | COHF | COBRA HAULAGE CORP | | | SCAC3 |
| 12111 | COHG | COHEN, LOUIS & SON INC | | | SCAC3 |
| 12112 | COHG | CORREA HAULING LLC | | | SCAC4 |
| 12113 | COHH | CENTRAL OHIO SHIPPERS | | | SCAC3 |
| 12114 | COHI | CINCINNATI TRUCKING INC | | | SCAC3 |
| 12115 | COHJ | CENTRAL OHIO TRANSIT AUTHORITY | | | SCAC3 |
| 12116 | COHL | COSMOS HOLDINGS LIMITED | | | SCAC3 |
| 12117 | COHM | CORNHUSKER MOTOR LINES INC | | | SCAC3 |
| 12118 | COHN | COHENNO INC | | | SCAC3 |
| 12119 | COHP | COHEN & POWELL, INCORPORATED | | | SCAC3 |
| 12120 | COHP | COLUMBIA HELICOPTERS INC | | | SCAC4 |
| 12121 | COHQ | CORNHUSKER CARTAGE | | | SCAC3 |
| 12122 | COHR | COOPER HORSE TRANSPORTATION INC | | | SCAC4 |
| 12123 | COHT | COHANSEY TRANSPORT | | | SCAC3 |
| 12124 | COHU | FLORENS CONTAINER SERVICES CO | | | SCAC4 |
| 12125 | COHV | COVEY HEAVY HAULING | | | SCAC3 |
| 12126 | COHX | *CITY OF HENDERSON | | | PWRC |
| 12127 | COHX | +CHEASPEAKE & OHIO HISTORICAL SOCIETY, INC. | | | PWRC |
| 12128 | COHX | CHESAPEAKE & OHIO HISTORICAL SOCIET | | | SCAC4 |
| 12129 | COHY | COHEY TRUCKING COMPANY | | | SCAC3 |
| 12130 | COHY | CONLEY TRANSPORT | | | SCAC4 |
| 12131 | COHZ | COCHRAN | | | PWRC |
| 12132 | COI | Absolute Flight Services (Pty) Ltd | Callsign: Contrail, ICAO designator changed from FYB | ZA | AVCODES |
| 12133 | COI | Coinspectra Aviacion, C.A. | Callsign: Coaviation, | YV | AVCODES |
| 12134 | COIA | CONTINENTAL MOVING | | | SCAC3 |
| 12135 | COIA | CONDOR AIR TRANSPORT LTD | | | SCAC4 |
| 12136 | COIB | CORRIDOR INTERURBAN TRANSPORT CORP | | | SCAC3 |
| 12137 | COIC | CARY OIL CO INC | | | SCAC3 |
| 12138 | COIC | COSIC | | | SCAC4 |
| 12139 | COID | COIN DEVICES CORPORATION | | | SCAC3 |
| 12140 | COIF | CHARLIES OIL CO INC | | | SCAC4 |
| 12141 | COIG | CARROLL OIL COMPANY INC | | | SCAC3 |
| 12142 | COIG | CHANDLER OIL LLC | | | SCAC4 |
| 12143 | COIH | COLORADO CARRIERS INC | | | SCAC3 |
| 12144 | COIH | CHINA ONE IMPORTS | | | SCAC4 |
| 12145 | COIJ | CONTINENTAL CARRIERS INC | | | SCAC3 |
| 12146 | COIK | COATICOOK EXPRESS INC | | | SCAC3 |
| 12147 | COIK | CONZEMIUS OIL INC | | | SCAC4 |
| 12148 | COIL | COCHOIS (INTERNATIONAL) LTD | | | SCAC3 |
| 12149 | COIL | COLUMBIA INTERMODAL LLC | | | SCAC4 |
| 12150 | COIM | CONTINENTAL MOVERS | | | SCAC3 |
| 12151 | COIO | COHAGEN TRANSFER & STORAGE CO INC | | | SCAC3 |
| 12152 | COIP | COLLINS, PAUL H | | | SCAC3 |
| 12153 | COIP | COLLINS, PAUL H | | | SCAC4 |
| 12154 | COIQ | CENTRAL OIL COMPANY | | | SCAC3 |
| 12155 | COIR | CONTRACT CARRIERS INC | | | SCAC3 |
| 12156 | COIR | COAST TO COAST CARRIERS INC | | | SCAC4 |
| 12157 | COIS | COASTAL ENVIRONMENTAL SYSTEMS INC | | | SCAC3 |
| 12158 | COIS | COIL CARRIERS INC | | | SCAC4 |
| 12159 | COIT | COMMUNITY ASPHALT CORPORATION | | | SCAC4 |
| 12160 | COIU | RICH GLORY (HONG KONG) LIMITED | | PRC | BIC |
| 12161 | COIU | CONVOY INTERCONTINENTAL CONTAINER | | | SCAC3 |
| 12162 | COIV | CONTINENTAL MOVERS INC | | | SCAC3 |
| 12163 | COIW | COMMERCIAL WAREHOUSE CO | | | SCAC3 |
| 12164 | COIW | CASE COURIERS DFW | | | SCAC4 |
| 12165 | COIY | CARL OIL INC | | | SCAC3 |
| 12166 | COIY | CDS OVERSEAS INC LOS ANGELES | | | SCAC4 |
| 12167 | COJ | Continental Jet, Inc. | Callsign: Conjet, | USA | AVCODES |
| 12168 | COJ | Coral Jet | Callsign: Coral Jet, | CAY | AVCODES |
| 12169 | COJA | CONTRERAS TRUCKING LLC | | | SCAC4 |
| 12170 | COJB | CORINTHIAKOS NAVIGATION LTD | | | SCAC4 |
| 12171 | COJC | COASTLINE RELOCATION LLC | | | SCAC4 |
| 12172 | COJD | CORONADO, RUBEN | | | SCAC4 |
| 12173 | COJE | COTA, JESS TRUCKING | | | SCAC3 |
| 12174 | COJF | CIRCLE OF FRIENDS TRUCKING SERVICES | | | SCAC4 |
| 12175 | COJG | CITY OF BOCA RATON | | | SCAC4 |
| 12176 | COJH | COLTON TRANSPORTATION | | | SCAC4 |
| 12177 | COJI | COLLINS, M C | | | SCAC3 |
| 12178 | COJJ | CONNECT TRANSPORT | | | SCAC4 |
| 12179 | COJK | COYOTE TRANSPORTATION SERVICES | | | SCAC4 |
| 12180 | COJL | COVER MATERIAL SALES INC | | | SCAC3 |
| 12181 | COJN | CONNER, JIM ENTERPRISES INC | | | SCAC3 |
| 12182 | COJQ | CORRENTE | | | SCAC4 |
| 12183 | COJR | COLELLO, JAMES R INC | | | SCAC3 |
| 12184 | COJS | CONFORTI SPECIALIZED & HEAVY HAULIN | | | SCAC4 |
| 12185 | COJV | COX TRUCKING INC | | | SCAC4 |
| 12186 | COJW | CROKER OARS WEST LTD | | | SCAC4 |
| 12187 | COJY | COJAY INC | | | SCAC3 |
| 12188 | COK | Ciskei International Airways Corp. | | ZA | AVCODES |
| 12189 | COK | Imperial Charter Services Ltd. | Callsign: Cocktail, | GB | AVCODES |
| 12190 | COKA | COSKLAV SHIPPING & CHARTERING | | | SCAC3 |
| 12191 | COKA | CONSTRUCCIONES KANRI SA DE CV | | | SCAC4 |
| 12192 | COKB | COCKE BROTHERS TRANSPORTATION SYSTE | | | SCAC3 |
| 12193 | COKC | C O S TRUCKING INC | | | SCAC4 |
| 12194 | COKD | CONNER TRUCKING | | | SCAC4 |
| 12195 | COKE | COCA-COLA USA | | | SCAC3 |
| 12196 | COKF | CAREY OF KANSAS CITY | | | SCAC4 |
| 12197 | COKG | COLLINS TRUCKING LLC | | | SCAC4 |
| 12198 | COKH | CORCORAN TRUCKING | | | SCAC3 |
| 12199 | COKH | CORCORAN TRUCKING | | | SCAC4 |
| 12200 | COKI | COOK TRUCKING SERVICE INC | | | SCAC3 |
