| 1 | SFI | Sky Freighters, N.V. | Callsign: Sky Friend, | B | AVCODES |
| 2 | SFI | Star Aerospace | Callsign: Space Star, Name changed to The Sky, Inc. | ROK | AVCODES |
| 3 | SFI | The Sky, Inc. | Callsign: Space Star, Name changed from Star Aerospace. | ROK | AVCODES |
| 4 | SFIA | SAFARI ARTS | | | SCAC4 |
| 5 | SFIE | STAR FIRE TRANSPORTATION | | | SCAC4 |
| 6 | SFIG | SAB FILTER INC | | | SCAC4 |
| 7 | SFIH | SUPREME FREIGHT INC | | | SCAC4 |
| 8 | SFII | SEFINA INDUSTRIES LTD | | | SCAC4 |
| 9 | SFIK | SPOT FREIGHT INC | | | SCAC4 |
| 10 | SFIL | SFI LOGISTICS INC | | | SCAC4 |
| 11 | SFIO | SWIFTI FOOD STORES | | | SCAC4 |
| 12 | SFIP | STAR TRANSPORTATION COMPANY, A FL C | | | SCAC4 |
| 13 | SFIQ | SNYDER FUELS INC | | | SCAC4 |
| 14 | SFIU | SFI TRANSIT | | MUS | BIC |
| 15 | SFIX | System Fuels, Inc. | 1/1980; added 4/1980; 1/1994; eliminated 4/1998 | | NAKINA |
| 16 | SFIX | HELM Financial Corp. | added 4/1998; 7/2000-7/2005 | | NAKINA |
| 17 | SFIX | System Fuels, Inc. | 1/80; added 4/80; 1/94; eliminated 4/98 | | NRHS |
| 18 | SFIX | HELM Financial Corp. | added 4/98; 7/2000 | | NRHS |
| 19 | SFIX | HELM FINANCIAL CORPORATION (SYSTEM FUELS, INC. LESSEE) | | | PWRC |
| 20 | SFIX | System Fuels | | | RSRV |
| 21 | SFIX | HELM FINANCIAL CORPORATION | | | SCAC4 |
| 22 | SFIY | SOUTHERN FOODS INC | | | SCAC4 |
| 23 | SFIZ | STONE FOREST INDUSTRY | | | PWRC |
