| 1 | CHC | China Ocean Helicopter Corporation | | | ICAO1 |
| 2 | CHCA | CONTRACT CHEMICAL CARRIERS CORP | | | SCAC4 |
| 3 | CHCB | CHECKER CAB COMPANY OF SAN ANTONIO | | | SCAC3 |
| 4 | CHCC | CHARTER CONTRACT CARRIER INC | | | SCAC3 |
| 5 | CHCD | CHANCELLOR TRUCKING INC | | | SCAC3 |
| 6 | CHCD | CANADIAN HYDRO COMPONENTS LTD | | | SCAC4 |
| 7 | CHCF | CHARLOTTE CHAIR | | | SCAC3 |
| 8 | CHCH | C & H FREIGHT (USA) LLC | | | SCAC4 |
| 9 | CHCI | CHACON TRUCKING | | | SCAC3 |
| 10 | CHCI | CARROLL HEALTHCARE INC | | | SCAC4 |
| 11 | CHCJ | CHURCHILL TRANSPORTATION COMPANY | | | SCAC3 |
| 12 | CHCJ | CULLENS COACHES | | | SCAC4 |
| 13 | CHCK | CHARTERLUCK ENTERPRISES LTD | | | SCAC4 |
| 14 | CHCL | CHARCOAL TRANSPORTS INC | | | SCAC3 |
| 15 | CHCM | CHANDLER & CLARKE | | | SCAC3 |
| 16 | CHCM | CHATEAU D'ARGENT | | | SCAC4 |
| 17 | CHCN | CHEMICAL CARRIERS, INC | | | SCAC3 |
| 18 | CHCN | CHACON, MIGUEL ANGEL | | | SCAC4 |
| 19 | CHCO | CHORRERA COMPANIA ARMADORA S A | | | SCAC3 |
| 20 | CHCO | CHI-CARGO INC | | | SCAC4 |
| 21 | CHCP | CHICAP PIPE LINE COMPANY | | | SCAC3 |
| 22 | CHCP | CHOICE TRANSPORT INC | | | SCAC4 |
| 23 | CHCQ | CHRIS CARTAGE, INC. | | | SCAC3 |
| 24 | CHCS | C & H COURIERS INC | | | SCAC3 |
| 25 | CHCS | CHIC CHAC EXPRESS | | | SCAC4 |
| 26 | CHCU | CHALLENGE CONTAINER LOGISTICS INC | | | SCAC4 |
| 27 | CHCV | CHEMICAL TRANSFER COMPANY INC | | | SCAC3 |
| 28 | CHCV | CHEMICAL TRANSFER CO | | | SCAC4 |
| 29 | CHCX | Cedar Heights Clay Co. | added 4/1969; 4/1970-1/1980; eliminated 4/1981 | | NAKINA |
| 30 | CHCX | Chapman Chemical Co. | added 4/1959; 4/1961; eliminated 10/1964 | | NAKINA |
| 31 | CHCX | Chapman Chemical Co. | Apr-61 | | NRHS |
| 32 | CHCX | Cedar Heights Clay Co. | added 4/69; 4/70-1/80; eliminated 4/81 | | NRHS |
| 33 | CHCX | *CHAPMAN CHEMICAL CO. | | | PWRC |
| 34 | CHCX | *CEDAR HEIGHTS CLAY CO. | | | PWRC |
| 35 | CHCX | *CHEHALIS & CENTRALIA RAILROAD ASSOCIATION | | | PWRC |
| 36 | CHCZ | CLEAN HARBOR COMPANY | | | PWRC |
