antispam.sugababes.nl has one IP number , but the reverse is localhost. ns4.de, umcn.nl, sunx.org, cabi.net, celox.nl and at least 100 other hosts point to the same IP. sugababes.nl is a domain controlled by two nameservers at exto.nl. They are on different IP networks. Incoming mail for sugababes.nl is handled by seven mailservers having a total of 27 IP numbers. Two mailservers have the same IP number. Some of them are on the same IP network. sugababes.nl has one IP number.