| 1 | JCL | Jet Cargo-Liberia | | LB | AVCODES |
| 2 | JCL | Jetcall GmbH & Co. KG. | Callsign: Jetcall, | D | AVCODES |
| 3 | JCLB | JGS CARRIERS LLC | | | SCAC4 |
| 4 | JCLC | J T C LLC | | | SCAC4 |
| 5 | JCLL | JUNCOS COMPETICION LLC | | | SCAC4 |
| 6 | JCLM | JCL INC | | | SCAC4 |
| 7 | JCLR | JONES CONCRETE LLC | | | SCAC4 |
| 8 | JCLS | JC LOGISTICS (USA) INC | | | SCAC4 |
| 9 | JCLV | JOHN CHANCE LAND SURVEYS | | | SCAC4 |
| 10 | JCLX | Mid-Am Equipment, Inc. | added 7/1979; 1/1980; eliminated 10/1984; added 10/1993; 1/1994; eliminated 7/1995; 7/2000-7/2005 (not listed); eliminated 7/2008 | | NAKINA |
| 11 | JCLX | Jaffe Car Lines, Inc. | added 10/1977; eliminated 7/1979 | | NAKINA |
| 12 | JCLX | Jaffe Car Lines, Inc. | eliminated 7/79 | | NRHS |
| 13 | JCLX | Mid-Am Equipment, Inc. | added 7/79; 1/80; eliminated 10/84; added 10/93; 1/94; eliminated 7/95; 7/2000 | | NRHS |
| 14 | JCLX | MID-AM EQUIPMENT, INC. {JAFFE CAR LINES, INC.] | | | PWRC |
| 15 | JCLX | Mid-Am Equipment | | | RSRV |
| 16 | JCLX | MID-AM EQUIPMENT INC | | | SCAC4 |
