| 1 | JFS | Juanda Flying School | Callsign: Jaemco, | RI | AVCODES |
| 2 | JFS | Juanda Flying School | | | ICAO1 |
| 3 | JFSH | JTS FREIGHT SYSTEMS LLC | | | SCAC4 |
| 4 | JFSI | JAVA FARM SUPPLY INC | | | SCAC4 |
| 5 | JFSM | JEFFS MOVERS INC | | | SCAC4 |
| 6 | JFSN | JF STOLL NORTH AMERICA INC | | | SCAC4 |
| 7 | JFSQ | JASMIN FREIGHT SYSTEMS INC | | | SCAC4 |
| 8 | JFST | JFS TRANSPORTES | | | SCAC4 |
| 9 | JFSU | ST JOHN FREIGHT SYSTEMS LTD | | IND | BIC |
| 10 | JFSU | ST JOHN FREIGHT SYSTEMS LTD | | | SCAC4 |
| 11 | JFSX | Fruit Growers Express Co. | 1/1941-1/1946 | | NAKINA |
| 12 | JFSX | Fruit Growers Express Co. (reporting mark for John F. Stegner Co.) | 7/1937-4/1938 | | NAKINA |
| 13 | JFSX | John F. Stegner | 7/1935 | | NAKINA |
| 14 | JFSX | John F. Stegner Co. (National Car Co.) | Apr-38 | | NRHS |
| 15 | JFSX | *FRUIT GROWERS EXPRESS CO. (JOHN F. STEGNER CO.) | | | PWRC |
| 16 | JFSX | +JFS RAILCAR, INC. | | | PWRC |
| 17 | JFSX | JFS RAILCAR INC | | | SCAC4 |
