ns1.voce.nl has one IP number , which also has a corresponding reverse pointer. hdp.nl, b2u.nl, louwes.nl, vivaria.nl, velzing.nl and at least 45 other hosts point to the same IP. hdp.nl, dwk.nl, b2u.nl, voce.nl, kieft.nl and at least 30 other hosts use this as a nameserver. voce.nl is a domain controlled by two nameservers at voce.nl themselves. They are on different IP networks. Incoming mail for voce.nl is handled by three mailservers having a total of four IP numbers. Two of them are on the same IP network. voce.nl has one IP number. ns1.voce.nl is hosted on a server in Netherlands.