Summary
ns1.surfnet.nl has one IP number , which also has a corresponding reverse pointer.
uu.nl,
hz.nl,
ac.be,
vu.nl,
kb.nl and at least 100 other hosts use this as a nameserver.
surfnet.nl is a domain controlled by four nameservers at
ja.net having a total of five IP numbers. All of them are on different IP networks. Incoming mail for
surfnet.nl is handled by two mailservers having a total of three IP numbers. Two mailservers have the same IP number. Two of them are on the same IP network.
ns1.surfnet.nl is hosted on a server in Netherlands.