diff --git a/main.go b/main.go
index ae2249d..8aaeb48 100644
--- a/main.go
+++ b/main.go
@@ -97,6 +97,9 @@ func (rs *routeStats) add(prefix netaddr.IPPrefix) {
 			if err != nil || len(names) == 0 {
 				return
 			}
+			if strings.HasSuffix(names[0], ".rdns.f3netze.de.") {
+				return
+			}
 			rs.Lock()
 			r.Hostname = strings.TrimRight(names[0], ".")
 			rs.Unlock()