Summary
ns01.qsc.de has one IP number , which also has a corresponding reverse pointer.
aer.de,
dkg.de,
dck.de,
udk.de,
ryf.de and at least 100 other hosts use this as a nameserver.
root.ns01.qsc.de are subdomains to this hostname.
qsc.de is a domain controlled by two nameservers at
qsc.de themselves. They are on the same IP network. Incoming mail for
qsc.de is handled by four mailservers also at
qsc.de. All of them are on the same IP network.
qsc.de has one IP number.
ns01.qsc.de is hosted on a server in Germany.