Summary
mx.cistron.nl has four IP numbers. All of them are on the same IP network.
mx.pnvd.nl,
mx.xs4all.nl,
mx3.xs4all.nl,
mx1.xs4all.nl,
mx4.xs4all.nl and at least twelve other hosts point to the same IP.
genp.nl,
hints.nl,
furry.nl,
dknfc.nl,
dknco.nl and at least 100 other hosts use this as a mailserver.
cistron.nl is delegated to two nameservers, however both delegated nameservers are missing in the zone and two other nameservers are listed instead. There are two duplicated IP numbers. Some of them are on the same IP network. Incoming mail for
cistron.nl is handled by two mailservers having a total of four IP numbers. There are two duplicated IP numbers. Some of them are on the same IP network.
mx.cistron.nl is hosted on four servers in Netherlands.