| Server name | Abbreviation | Variant name |
|---|---|---|
| nethack.alt.org | NAO | NetHack 3.4.3-NAO |
| un.nethack.nu | EUN | UnNetHack 5.3.0 |
| grunthack.org | GHO | GruntHack 0.2.0 |
| nethack4.org | NH4 | NetHack4 4.3.0 |
| nethack.xd.cm | NXC_NAO | NetHack 3.4.3-NAO |
| nethack.xd.cm | NXC_DNH | dNetHack 3.9.3 |
| nethack.xd.cm | NXC_NH4K | NetHack Fourk 4.3.0.1 |
| nethack.xd.cm | NXC_SLTH | SlashTHEM 0.7.0 |
| nethack.xd.cm | NXC_SHC | SporkHack 0.6.3 |
| nethack.xd.cm | NXC_N13 | NetHack 1.3d |
| nethack.xd.cm | NXC_UNH | UnNetHack 5.3.1 |
| nethack.xd.cm | NXC_GRH | GruntHack 0.2.0 |