All available race results Frans de Coster
| Date | Race | Rank |
| 01/05 | Grote 1 Mei-Prijs Hoboken | 14 |
Rider information for 1941
| Rank | 790 |
| Score | 0 |
| Name | Frans DE COSTER |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 03/06 | La Flèche Wallonne | 20 |
| Tour de Belgique | ||
| 19/06 | Stage 1 | 40 |
Rider information for 1945
| Rank | 252 |
| Score | 61 |
| Name | Frans DE COSTER |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 30/07 | Scheldeprijs - Schoten | 14 |
Rider information for 1946
| Rank | 854 |
| Score | 5 |
| Name | Frans DE COSTER |
| Country | Belgium |
| Team | Thompson |
| Date | Race | Rank |
| 01/06 | Ronde van Limburg | 13 |
| G.P. Impanis | ||
| 28/07 | Stage 2 | 2 |
| 28/07 | General Classification | 6 |
Rider information for 1947
| Rank | 406 |
| Score | 70 |
| Name | Frans DE COSTER |
| Country | Belgium |
| Team | Individual |
| Date | Race | Rank |
| 11/07 | Ronde van Limburg | 8 |
Rider information for 1948
| Rank | 641 |
| Score | 35 |
| Name | Frans DE COSTER |
| Country | Belgium |
| Team | Thompson |
| Date | Race | Rank |
| 17/04 | Paris - Roubaix | 85 |
| 31/07 | G.P. Impanis | 11 |
Rider information for 1949
| Rank | 952 |
| Score | 10 |
| Name | Frans DE COSTER |
| Country | Belgium |
| Team | Terrot - Hutchinson |
No results available in season 1953.
Rider information for 1953
| Rank | 1337 |
| Score | 0 |
| Name | Frans DE COSTER |
| Country | Belgium |
| Team | Thompson - Sercu |