Summary
ns1.bom.dk has one IP number , which also has a corresponding reverse pointer.
750.dk,
ope.dk,
fev.dk,
bom.dk,
6cam.dk and at least 100 other hosts use this as a nameserver.
bom.dk is a domain controlled by two nameservers at
bom.dk themselves. They are on different IP networks. Incoming mail for
bom.dk is handled by one mailserver also at
bom.dk.
bom.dk has one IP number.
ns1.bom.dk is hosted on a server in Germany even though the hostname implies Denmark.