sextube.se is delegated to two nameservers, however both delegated nameservers are missing in the zone. All nameservers are at
fastpark.net. They are on different IP networks.
ida.se,
i3f.fr,
fey.se,
e28.org,
fmcg.se and at least 56 other hosts share nameservers with this domain.
se is a domain controlled by ten nameservers at
ns.se. Some of them are on the same IP network.