diff --git a/config/net/serv.nix b/config/net/serv.nix
index 2eab97e..05f2227 100644
--- a/config/net/serv.nix
+++ b/config/net/serv.nix
@@ -79,6 +79,7 @@
       factorio = "172.20.73.73";
       zengel = "172.20.73.74";
       prometheus = "172.20.73.75";
+      mastodon = "172.20.73.76";
     };
     ipv6Router = "serv-gw";
     subnets6.dn42 = "fd23:42:c3d2:582::/64";
@@ -162,6 +163,7 @@
       network-homepage = "2a00:8180:2c00:282::2f";
       owncast = "2a00:8180:2c00:282::32";
       prometheus = "2a00:8180:2c00:282::4b";
+      mastodon = "2a00:8180:2c00:282::4c";
     };
   };