| Name | Abbrev | Issuers | |
| AFA number | AFA | 134 | (Albania .. Yugoslavia) |
| Afinsa | Afi | 28 | (Angola .. Zambezia) |
| Belgium | 10 | (Belgian Congo .. Zaire) | |
| Colnect codes | Col | 257 | (Afghanistan .. Zimbabwe) |
| Edifil | 19 | (La Aguera .. Spanish West Africa) | |
| Götig and Jalil | Göt | 0 | |
| Michel | Mi | 741 | (Abu Dhabi .. Zululand) |
| NVPH | 13 | (Aruba .. Surinam) | |
| POFIS | POF | 4 | (Czech Republic .. Slovakia) |
| RHM | 1 | (Brazil) | |
| Romfilatelia | Rom | 1 | (Romania) |
| Sakura | 12 | (Japanese occupation of Burma .. Japanese occupation of the Straits Settlements) | |
| Sassone | 16 | (Fiume .. Vatican City) | |
| Scott | Sc | 517 | (Abu Dhabi .. Zululand) |
| Seven Seas Stamps | 4 | (Australia .. Norfolk Island) | |
| Siddiqui Catalogue | Siddiqui | 1 | (Pakistan) |
| Stamp Number | SN | 676 | (Abu Dhabi .. Zululand) |
| StampWorld | SW | 177 | (Aden .. German occupation of Ljubljana) |
| Stanley Gibbons | SG | 642 | (Abu Dhabi .. Zululand) |
| Unificato | 143 | (Albania .. Trieste Zone B) | |
| Unitrade | 2 | (Canada, Jamaica) | |
| WNS | 204 | (Afghanistan .. Zimbabwe) | |
| Yvert et Tellier | YT | 650 | (Abu Dhabi .. Zululand) |
| Zumstein | ZM | 5 | (Liechtenstein .. Switzerland) |