| 9101 | CLJ | Airlines Management Limited | Callsign: Colourjet, | GB | AVCODES |
| 9102 | CLJ | Sky Light Ltd. | | RUS | AVCODES |
| 9103 | CLJ | Cello Aviation Ltd. | | GB | AVCODES |
| 9104 | CLJ | CITY OF LA JUNTA | | | PWRC |
| 9105 | CLJB | C L M TIMBER INC | | | SCAC4 |
| 9106 | CLJC | CLIFT, J C TRUCK LINE INC | | | SCAC3 |
| 9107 | CLJD | CAM LOGISTICS INC | | | SCAC4 |
| 9108 | CLJE | CE LOGISTICS | | | SCAC4 |
| 9109 | CLJG | COUNTYLINE TRUCKING LLC | | | SCAC4 |
| 9110 | CLJH | CLARK, JAMES H & SON INC | | | SCAC3 |
| 9111 | CLJH | CLARK, JAMES H & SON INC | | | SCAC4 |
| 9112 | CLJJ | CLARK, J & J | | | SCAC3 |
| 9113 | CLJJ | CALEDON TRANSPORT | | | SCAC4 |
| 9114 | CLJL | CLARK CARTAGE COMPANY | | | SCAC3 |
| 9115 | CLJN | CALLEJA, NICK TRUCKING | | | SCAC3 |
| 9116 | CLJO | COLE, JOHN INC | | | SCAC3 |
| 9117 | CLJQ | CLARK, JOE W | | | SCAC3 |
| 9118 | CLJS | CRITCHETT, LORAN J & SONS (& SUZY), | | | SCAC3 |
| 9119 | CLJT | COLLIER, L R TRUCKING INC | | | SCAC3 |
| 9120 | CLJT | CECO LOGIS INC | | | SCAC4 |
| 9121 | CLJV | CROSS LOGISTICS INC | | | SCAC4 |
| 9122 | CLJW | CORPORATE LIMOUSINE SERVICE LTD | | | SCAC3 |
| 9123 | CLJW | C & L TRANSPORT INC | | | SCAC4 |
| 9124 | CLJY | CARRIER LOGISTICS LLC | | | SCAC4 |
| 9125 | CLK | Clark Aviation Corp. | Callsign: Clarkair, | USA | AVCODES |
| 9126 | CLK | Clark Aviation | | | ICAO1 |
| 9127 | CLK | Cadillac & Lake City Ry. Co. | 7/1965-10/1966 & 1/1975; eliminated 7/1976; added 7/1978; added 10/1978; 1/1980; eliminated 4/1990; 1/1994 | | NAKINA |
| 9128 | CLK | Cadillac & Lake City Ry. Co. | 7/65-10/66 & 1/75; eliminated 7/76; added 7/78; added 10/78; 1/80; eliminated 4/90; 1/94 | | NRHS |
| 9129 | CLK | RETIRED 05-26-94 ATP (093) [CADILLAC & LAKE CITY RY.] | | | PWRC |
| 9130 | CLK | Cadillac and Lake City Railway | | | RSRV |
| 9131 | CLKA | CLARK, WILLIAM B | | | SCAC3 |
| 9132 | CLKA | CLARKS TRANS | | | SCAC4 |
| 9133 | CLKB | CLARK, WILLIAM S | | | SCAC3 |
| 9134 | CLKC | CLARK, ZEPHIA ODELL | | | SCAC3 |
| 9135 | CLKD | CLEARLINK SHIPPING | | | SCAC3 |
| 9136 | CLKF | CLARK FARMS | | | SCAC3 |
| 9137 | CLKG | CLARKS TRUCKING & EXCAVATING INC | | | SCAC3 |
| 9138 | CLKG | C & L TRUCKING | | | SCAC4 |
| 9139 | CLKH | CLARK, W V HARVESTING | | | SCAC4 |
| 9140 | CLKI | CHALKER TRANSFER | | | SCAC3 |
| 9141 | CLKJ | C & L TRUCKING LLC | | | SCAC4 |
| 9142 | CLKK | CLARKE TRUCKING | | | SCAC3 |
| 9143 | CLKK | CLARK TRUCKING | | | SCAC4 |
| 9144 | CLKL | CLARK TRUCK LINE | | | SCAC3 |
| 9145 | CLKM | CLARK, TERRY | | | SCAC3 |
| 9146 | CLKN | CLARK, CLARENCE | | | SCAC3 |
| 9147 | CLKO | CLARK TRANSFER CO | | | SCAC3 |
| 9148 | CLKP | CLARK TRANSPORTATION INC | | | SCAC3 |
| 9149 | CLKQ | CLARK, BILL DELIVERY SERVICE | | | SCAC3 |
| 9150 | CLKR | CLARKS TRANSFERRING SERVICE, INC | | | SCAC3 |
| 9151 | CLKR | C L D TRUCKING INC | | | SCAC4 |
| 9152 | CLKS | CLARK TRUCK LINE | | | SCAC3 |
| 9153 | CLKS | CLARK SERVICES | | | SCAC4 |
| 9154 | CLKT | CLARK TRANSFER, INC | | | SCAC3 |
| 9155 | CLKT | CLARK TRANSFER INC | | | SCAC4 |
| 9156 | CLKU | CALT(CITY AIRPORT, LOGIS&TRAVEL) | | ROK | BIC |
| 9157 | CLKU | CONTAINERLINK LIMITED | | | SCAC3 |
| 9158 | CLKV | CLARK, JOHN D | | | SCAC3 |
| 9159 | CLKW | CLARK, HOWARD W INC | | | SCAC3 |
| 9160 | CLKW | CLARK LAKE TRUCKING INC | | | SCAC4 |
| 9161 | CLKY | CLUKEY, F W TRUCKING INC | | | SCAC3 |
| 9162 | CLL | Aerovias Castillo, S.A. | Callsign: Aerocastillo, | MEX | AVCODES |
| 9163 | CLL | Aerovias Castillo | | | ICAO1 |
| 9164 | CLLA | COLLECTRON OF ARIZONA | | | SCAC4 |
| 9165 | CLLC | COOLEY, LOU & COMPANY | | | SCAC3 |
| 9166 | CLLC | CALLICO DISTRIBUTORS INC | | | SCAC4 |
| 9167 | CLLE | COLLE TOWING CO INC | | | SCAC3 |
| 9168 | CLLF | CARLS, LESLIE R | | | SCAC3 |
| 9169 | CLLG | CATTELL, MARK A TRUCKING | | | SCAC3 |
| 9170 | CLLG | CORE LOGISTICS LLC | | | SCAC4 |
| 9171 | CLLI | COLLINS STORAGE & MOVING INC | | | SCAC3 |
| 9172 | CLLI | CARLSON LOGISTICS INC | | | SCAC4 |
| 9173 | CLLJ | CALLAHAN, J M & SONS | | | SCAC3 |
| 9174 | CLLK | CLEAR LAKE STOCK & FREIGHT | | | SCAC3 |
| 9175 | CLLK | CLEAR LAKE LUMBER INC | | | SCAC4 |
| 9176 | CLLM | CALMILLS INC | | | SCAC3 |
| 9177 | CLLM | CASTRO LOPEZ, ALEXANDRO & MIGUEL LO | | | SCAC4 |
| 9178 | CLLN | CALLANAN MARINE CORP | | | SCAC3 |
| 9179 | CLLO | COLLINS TRANSFER CO INC | | | SCAC3 |
| 9180 | CLLP | CREOR, LANCE P | | | SCAC4 |
| 9181 | CLLQ | CARROLL MOVING & STRANSFER COMPANY | | | SCAC3 |
| 9182 | CLLQ | COYOTE LOGISTICS LLC | | | SCAC4 |
| 9183 | CLLR | CLIFTON LONE STAR MOVING & STORAGE | | | SCAC3 |
| 9184 | CLLR | COLLINS, R TRUCKING CO | | | SCAC4 |
| 9185 | CLLS | CHRISTIAN, L L TRANSPORT LIMITED | | | SCAC3 |
| 9186 | CLLU | CASSILON LIMITED | | GB | BIC |
| 9187 | CLLU | CURRIE LINE LTD. | | | SCAC3 |
| 9188 | CLLU | CASSILON | | | SCAC4 |
| 9189 | CLLV | COLLINSVILLE DELIVERY SERVICE INC | | | SCAC3 |
| 9190 | CLLV | CENTRAL LABORATORY FOR | | | SCAC4 |
| 9191 | CLLW | CONAGRA LIMITED LAMB WESTON DIVISIO | | | SCAC4 |
| 9192 | CLLY | CONNOLLYS LIMOUSINE SERVICE | | | SCAC3 |
| 9193 | CLM | Cargo Link (Caribbean), Inc. | Callsign: Cargo Link, | BDS | AVCODES |
| 9194 | CLM | California Air Commuter | Callsign: Calcom, | USA | AVCODES |
| 9195 | CLM | Cargo Link (Caribbean) | | | ICAO1 |
| 9196 | CLMA | COLMA DRAYAGE, INC | | | SCAC3 |
| 9197 | CLMA | COLMA DRAYAGE INC | | | SCAC4 |
| 9198 | CLMB | COLUMBIA TRUCKING INC | | | SCAC3 |
| 9199 | CLMB | COLUMBIA TRUCKING INC | | | SCAC4 |
| 9200 | CLMC | CLM CARTAGE | | | SCAC3 |
