Summary
mailman4.k1net.de has one IP number , which also has a corresponding reverse pointer.
nsl3.k1net.de point to the same IP.
k1net.de is a domain controlled by three nameservers. Two of them are on the same IP network. Incoming mail for
k1net.de is handled by two mailservers at
k1net.de themselves. They are on the same IP network.
k1net.de has one IP number.
mailman4.k1net.de is hosted on a server in Germany.