| Name | Abbrev | (Please log in to see catalog coverage summaries.) |
| AFA number | AFA | |
| Afinsa | Afi | |
| Belgium | ||
| Colnect codes | Col | |
| Edifil | ||
| Götig and Jalil | Göt | |
| Michel | Mi | |
| NVPH | ||
| POFIS | POF | |
| RHM | ||
| Romfilatelia | Rom | |
| Sakura | ||
| Sassone | ||
| Scott | Sc | |
| Seven Seas Stamps | ||
| Siddiqui Catalogue | Siddiqui | |
| Stamp Number | SN | |
| StampWorld | SW | |
| Stanley Gibbons | SG | |
| Unificato | ||
| Unitrade | ||
| WNS | ||
| Yvert et Tellier | YT | |
| Zumstein | ZM |