| 1 | CHX | Chirag Air | Callsign: Chirag Air, | AZ | AVCODES |
| 2 | CHX | ACE Transvalair | IATA: VY, Callsign: Charter Express, Name changed from Air Charter Express | F | AVCODES |
| 3 | CHX | Hubschrauber IM Luftrettungsdienst | Callsign: Christoph, | D | AVCODES |
| 4 | CHX | Air Charter Express | | F | AVCODES |
| 5 | CHX | Air Charter Express | Callsign: Charter Express, Name changed to ACE Transvalair | F | AVCODES |
| 6 | CHX | Cutler-Hammer Inc. | 1/1950-7/1954; eliminated 4/1956 | | NAKINA |
| 7 | CHX | Cutler-Hammer Inc. | Jan-52 | | NRHS |
| 8 | CHX | *CUTLER-HAMMER INC. | | | PWRC |
| 9 | CHX | +CONTICO INTERNATIONAL, LLC | | | PWRC |
| 10 | CHXB | CHARLIES TRANSPORT | | | SCAC4 |
| 11 | CHXC | CHEMLOGIX LLC | | | SCAC4 |
| 12 | CHXD | CHREX (DIV OF C H | | | SCAC4 |
| 13 | CHXE | CHISHOLM TRAIL EXPRESS INC | | | SCAC3 |
| 14 | CHXF | CHIEF EXPRESS LLC | | | SCAC4 |
| 15 | CHXG | CT LOGISTIC LLC | | | SCAC4 |
| 16 | CHXI | CHAIRTEX INC | | | SCAC4 |
| 17 | CHXJ | CHEETAH EXPRESS | | | SCAC4 |
| 18 | CHXK | CHARTER TRANSPORT INC | | | SCAC4 |
| 19 | CHXL | CHIPPER EXPRESS LTD | | | SCAC4 |
| 20 | CHXM | CHAMPION EXPRESS | | | SCAC4 |
| 21 | CHXN | CHAPMAN INC | | | SCAC4 |
| 22 | CHXO | CHEMEX CORPORATION | | | SCAC4 |
| 23 | CHXP | CHASER TRANSPORT INC | | | SCAC4 |
| 24 | CHXQ | CHANGER TRANSPORT INC | | | SCAC4 |
| 25 | CHXR | C & H EXPRESS INC | | | SCAC3 |
| 26 | CHXS | CHARTER EXPRESS INC | | | SCAC3 |
| 27 | CHXS | CHIMPOS TRANSPORT | | | SCAC4 |
| 28 | CHXT | C R TRANSPORTATION | | | SCAC3 |
| 29 | CHXU | CHEMCO AS | | N | BIC |
| 30 | CHXW | CHALLENGER TRANSPORT & TOWING INC | | | SCAC4 |
