| 1 | SCM | Aero Servicio de Carga Mexicana S.A. de C.V. | Callsign: Aerocarga, | MEX | AVCODES |
| 2 | SCM | American Jet International Corp. | Callsign: Screamer, | USA | AVCODES |
| 3 | SCM | American Jet International | | | ICAO1 |
| 4 | SCM | Strouds Creek & Muddlety R.R. | 1/1975-1/1994 | | NAKINA |
| 5 | SCM | Strouds Creek & Muddlety R.R. | 1/75-1/94 | | NRHS |
| 6 | SCM | RETIRED 04-20-92 (0687) ATP [STROUDS CREEK & MUDDLETY RR] | | | PWRC |
| 7 | SCM | Strouds Creek and Muddlety Railroad | | | RSRV |
| 8 | SCM | SCHWARTZ, MILTON | | | SCAC4 |
| 9 | SCMC | Stagecoach Manchester | | GB | TRAFFIC |
| 10 | SCMD | SEACROWN MARITIME LTD | | | SCAC4 |
| 11 | SCMF | SCM LINES | | | SCAC4 |
| 12 | SCMG | S C M N GLOBAL | | | SCAC4 |
| 13 | SCMI | SPECIALITY CHEMICAL TRANSPORT SERVI | | | SCAC4 |
| 14 | SCMID | Stagecoach Midland | | GB | TRAFFIC |
| 15 | SCMK | SCHURMA | | | SCAC4 |
| 16 | SCML | SOUTHERN CHOICE MOVING SERVICE LLC | | | SCAC4 |
| 17 | SCMM | SCOTT, MELVIN TRANSPORT INC | | | SCAC4 |
| 18 | SCMN | SCOBEY MOVING & STORAGE LTD | | | SCAC4 |
| 19 | SCMP | SUGAR CAMP 155 | | | SCAC4 |
| 20 | SCMQ | SCHICK MOVING AND STORAGE COMPANY | | | SCAC1 |
| 21 | SCMS | SMART CHOICE MOVERS INC | | | SCAC4 |
| 22 | SCMT | SCHMIDT TRANSPORTATION INC | | | SCAC4 |
| 23 | SCMU | MAERSK A/S | | DK | BIC |
| 24 | SCMU | SAFMARINE CONTAINER LINES NV | | | SCAC4 |
| 25 | SCMW | SCHULER, MARLYN | | | SCAC4 |
| 26 | SCMX | Shell Chemical Co. | 7/1937-1/1943 | | NAKINA |
| 27 | SCMX | Shell Chemical Div., Shell Union Oil Corp. | 1/1945-1/1946 | | NAKINA |
| 28 | SCMX | Shell Chemical Corp. | 4/1947-10/1957; eliminated 4/1960 | | NAKINA |
| 29 | SCMX | Shell Chemical Co., a Division of Shell Oil Co. | added 4/1960; 4/1961-10/1966; eliminated 7/1969 | | NAKINA |
| 30 | SCMX | Shell Oil Co. | added 7/1969; 4/1970-7/2000 | | NAKINA |
| 31 | SCMX | Shell Oil Co. U.S. (Lubricants) | added 4/2003 | | NAKINA |
| 32 | SCMX | Shell Oil Co. | 7/2005 | | NAKINA |
| 33 | SCMX | Shell Chemical Co. | 4/38-1/52 | | NRHS |
| 34 | SCMX | Shell Chemical Corp. | Oct-57 | | NRHS |
| 35 | SCMX | Shell Chemical Co., a Division of Shell Oil Co. | 4/61-10/66; eliminated 7/69 | | NRHS |
| 36 | SCMX | Shell Oil Co. | added 7/69; 4/70-7/2000 | | NRHS |
| 37 | SCMX | *SOUTH CAROLINA RAILROAD MUSEUM | | | PWRC |
| 38 | SCMX | +(SOEX) SHELL OIL COMPANY | | | PWRC |
| 39 | SCMX | Shell Oil | | | RSRV |
| 40 | SCMX | SHELL OIL COMPANY | | | SCAC4 |
