Summary
ns1.ultraweb.dk has one IP number , which is the same as for
ultraweb.dk, but no corresponding reverse pointer.
crime.dk,
gorecki.se,
ns.crime.dk,
ultraweb.dk,
www.holl.dk and at least 100 other hosts point to the same IP.
holl.dk,
crime.dk,
skiveby.dk,
micha-el.dk,
ultraweb.dk and at least five other hosts use this as a nameserver.
ultraweb.dk is delegated to two nameservers, however one extra nameserver is listed in the zone. Two nameservers have the same IP number. Some of them are on the same IP network. Incoming mail for
ultraweb.dk is handled by one mailserver at
ultraweb.dk themselves.
ns1.ultraweb.dk is hosted on a server in Netherlands even though the hostname implies Denmark.