| 1 | SJM | Southern Air Transport, Inc. | IATA: SJ, Callsign: Southern Air, Ceased operations | USA | AVCODES |
| 2 | SJM | Sino Jet Management Limited | Callsign: Sino Sky, | PRC | AVCODES |
| 3 | SJMA | SOJOURN MARINE | | | SCAC4 |
| 4 | SJMM | SCOTT, JOHN | | | SCAC4 |
| 5 | SJMN | SALINAS, JUAN MANUEL | | | SCAC4 |
| 6 | SJMX | St. Joe Minerals Corp. (name changed to Zinc Corp. of America, reporting marks to ZCAX) | added 10/1970; 1/1975-1/1980; eliminated 10/1988 | | NAKINA |
| 7 | SJMX | St. Joe Minerals Corp. (name changed to Zinc Corp. of America, reporting marks to ZCAX) | added 10/70; 1/75-1/80; eliminated 10/88 | | NRHS |
| 8 | SJMX | ST. JOE MINERALS CORP. (NAME CHANGED TO ZINC CORP. OF AMERICA, MARK CHANGED TO ZCAX) | | | PWRC |
| 9 | SJMX | St. Joe Minerals Corporation | | | RSRV |
| 10 | SJMZ | ST. JOE'S MINE | | | PWRC |
