The following is a list of nations' three-letter codes used by the FMF.
List of currently-used codes by nation
This is a list of codes which are in current use by the FMF.
List of all-time nations by code
This list includes all codes ever used by the FMF, including those of former member nations. Active nations are highlighted in green. Nations highlighted in red were never represented in an FMF-sanctioned match during their membership.
A small number of codes have been re-used by the FMF; typically by official successor teams with similar names to their predecessor team.
These codes have been issued to teams which have yet to become full FMF members, but which have been granted conditional membership during the FMF's existence.
These codes have yet to be issued to any FMF members, but have otherwise been issued by the FMS to national teams in other sporting branches within the federation, and are therefore reserved for potential future FMF usage. Nations which do not participate in any FMS-recognised sport as a singluar entity, but instead are represented by numerous constituent teams may also reserve a code for use within the auspices of the Micras Organisation for Standardisation.