| 1 | SCG | Sitra Cargo System | Callsign: Sitra, | PE | AVCODES |
| 2 | SCG | Sky Carrier SP.z.o.o. | Merged into SprintAir Cargo - SAR | PL | AVCODES |
| 3 | SCGB | SCHRAGE TRUCKING LLC | | | SCAC4 |
| 4 | SCGC | SCARLET & GRAY CORP | | | SCAC4 |
| 5 | SCGD | SCHEAR TRUCKING | | | SCAC4 |
| 6 | SCGF | SCG INDUSTRIES LIMITED | | | SCAC4 |
| 7 | SCGG | SCHOENEGGE INC | | | SCAC1 |
| 8 | SCGH | SUPERIOR CRUDE GATHERING INC | | | SCAC4 |
| 9 | SCGM | SNICO CARTAGE INC | | | SCAC4 |
| 10 | SCGN | SUPER COMERCIAL GONZALEZ SA DE CV | | | SCAC4 |
| 11 | SCGP | SCOTT LOGISTICS CORP | | | SCAC4 |
| 12 | SCGS | STAIR CARGO SERVICE INC | | | SCAC1 |
| 13 | SCGT | SOUTH CARGO TRANSPORTATION INC | | | SCAC4 |
| 14 | SCGU | WKS INDUSTRIAL GAS PTE LTD | | SGP | BIC |
| 15 | SCGV | ST CLAIR SERVICES INC | | | SCAC4 |
| 16 | SCGX | Eades Commodities Co. | added 4/1990; 1/1994; eliminated 7/2000 | | NAKINA |
| 17 | SCGX | Schuler Grain Co. | added 10/1979; 1/1980; eliminated 4/1990 | | NAKINA |
| 18 | SCGX | Standard Carbon Co. | 7/1923 | | NAKINA |
| 19 | SCGX | General Electric Rail Services Corp. | added 7/2000; 7/2000-7/2005 | | NAKINA |
| 20 | SCGX | Schuler Grain Co. | 1/80; eliminated 4/90 | | NRHS |
| 21 | SCGX | Eades Commodities Co. | added 4/90; 1/94; eliminated 7/2000 | | NRHS |
| 22 | SCGX | General Electric Rail Services Corp. | added 7/2000; 7/2000 | | NRHS |
| 23 | SCGX | *STANDARD CARBON CO. | | | PWRC |
| 24 | SCGX | *EADES COMMODITIES COMPANY [SCHULER GRAIN CO.] | | | PWRC |
| 25 | SCGX | +GENERAL ELECTRIC RAIL SERVICES CORP. | | | PWRC |
| 26 | SCGX | Schuler Grain (Eades Commodities) | | | RSRV |
| 27 | SCGX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
