mail.heem.nl has one IP number , but the reverse is lsw.solcon.nl. veg.nl, peb.nl, ppda.nl, eanl.nl, mx.rgl.nl and at least 96 other hosts point to the same IP. heem.nl is a domain controlled by three nameservers at solcon.nl. All of them are on the same IP network. Incoming mail for heem.nl is handled by four mailservers also at solcon.nl. All of them are on the same IP network. mail.heem.nl is hosted on a server in Netherlands.