| 1 | ASFX | American Steel Foundries, Inc. (Marks temporarily assigned for other than tank cars; marks expire 1Jan87) | 1/1994 (not listed) | | NAKINA |
| 2 | ASFX | American Steel Foundries, Inc. (Marks temporarily assigned for other than tank cars; marks expire 1Jan81) | 1/1980 | | NAKINA |
| 3 | ASFX | American Steel Foundries, Inc. (Marks temporarily assigned for other than tank cars; marks expire 1Apr75) | 1/1975 | | NAKINA |
| 4 | ASFX | American Steel Foundries, Inc. — temporary expiring 1Apr71 | 4/1970; eliminated 10/1972 | | NAKINA |
| 5 | ASFX | American Steel Foundries, Inc. — temporary expiring 1Apr67 | 10/1966 | | NAKINA |
| 6 | ASFX | American Steel Foundries, Inc. — temporary expiring 15Oct65 | 7/1965 | | NAKINA |
| 7 | ASFX | American Steel Foundries, Inc. — temporary expiring 15Oct62 | added 7/1962; 7/1962 | | NAKINA |
| 8 | ASFX | American Steel Foundries — temporary expiring 15Oct61 | 4/1961 | | NAKINA |
| 9 | ASFX | American Steel Foundries — temporary expiring 10Jan58 | 10/1957 | | NAKINA |
| 10 | ASFX | American Steel Foundries — temporary expiring 10Dec54 | 7/1954 | | NAKINA |
| 11 | ASFX | American Steel Foundries — temporary expiring 31Dec52 | 1/1952 | | NAKINA |
| 12 | ASFX | American Steel Foundries — temporary expiring 31Dec50 | 1/1950 | | NAKINA |
| 13 | ASFX | American Steel Foundries — temporary expiring 31Dec47 | 4/1947 | | NAKINA |
| 14 | ASFX | American Steel Foundries — temporary expiring 31Dec46 | 1/1946 | | NAKINA |
| 15 | ASFX | American Steel Foundries — temporary expiring 31Dec45 | 1/1945 | | NAKINA |
| 16 | ASFX | American Steel Foundries — temporary expiring 31Dec43 | 1/1943 | | NAKINA |
| 17 | ASFX | American Steel Foundries — temporary expiring 31Dec41 | 1/1941 | | NAKINA |
| 18 | ASFX | American Steel Foundries -- temporary expiring 31Dec52 | Jan-52 | | NRHS |
| 19 | ASFX | American Steel Foundries -- temporary expiring 10Jan58 | Oct-57 | | NRHS |
| 20 | ASFX | American Steel Foundries -- temporary expiring 15Oct61 | Apr-61 | | NRHS |
| 21 | ASFX | American Steel Foundries, Inc. | 7/65-10/66 | | NRHS |
| 22 | ASFX | American Steel Foundries, Inc. -- temporary expiring 1Apr71 | 4/70; eliminated 10/72 | | NRHS |
| 23 | ASFX | American Steel Foundries, Inc. (Marks temporarily assigned for other than tank cars; marks expire 1Apr75) | Jan-75 | | NRHS |
| 24 | ASFX | American Steel Foundries, Inc. (Marks temporarily assigned for other than tank cars; marks expire 1Jan81) | Jan-80 | | NRHS |
| 25 | ASFX | ASF-KEYSTONE, INC. (AMERICAN STEEL FOUNDRIES) | | | PWRC |
| 26 | ASFX | American Steel Foundries | | | RSRV |
| 27 | ASFX | AMERICAN STEEL FOUNDRIES INC | | | SCAC3 |
| 28 | ASFX | ASF-KEYSTONE INC | | | SCAC4 |