| Pos | Name | Country | stamps | Since |
|---|---|---|---|---|
| 1000 | Calero Maria | España | 1 | 11/08/2022 |
| 899 | Calpena Hernandez Jose Maria | España | 1 | 02/02/2017 |
| 745 | Calvente David | España | 1 | 28/08/2009 |
| 503 | Calviño Gustavo | España | 22 | 28/09/2011 |
| 522 | Calvo Jose Luis | España | 8 | 04/02/2014 |
| 66 | Camargo Pulido Hector Mario | México | 2309 | 26/04/2014 |
| 384 | Camisotti Humberto | Venezuela | 21 | 26/08/2017 |
| 301 | Campa Lorenzo Ainoa | España | 57 | 20/01/2017 |
| 207 | Campuzano Francisco | Colombia | 239 | 15/10/2011 |
| 1018 | Canal Sala Carles | España | 1 | 15/10/2009 |
| 437 | Cano Silvia | España | 36 | 04/03/2012 |
| 607 | Cano Branchat Emilio | España | 3 | 16/05/2010 |
| 636 | Cano Cardenas Jesus | España | 3 | 26/09/2016 |
| 230 | Cantele Antonio | Chile | 74 | 25/01/2011 |
| 878 | Cantú Gutiérrez Juan | México | 1 | 12/11/2018 |
| 660 | Carbajal Ricardo | México | 3 | 19/07/2010 |
| 550 | Carbajosa Jaime | España | 14 | 09/07/2012 |
| 438 | Carbonell Raquel | España | 14 | 23/01/2011 |
| 489 | Carbonell Rojas Luis Miguel | Cuba | 12 | 14/06/2019 |
| 835 | Carceller Galan Alba | España | 1 | 24/11/2015 |