Incoming mail for hualei.online.sh.cn is handled by one mailserver having a total of two IP numbers. They are on different IP networks. hualei.online.sh.cn has two IP numbers. They are on the same IP network. kio.kz, fd0.net, 5991.com, sm555.com, server.no and at least 55 other hosts point to the same IP. hualei.online.sh.cn use this as a mailserver. online.sh.cn is a domain controlled by two nameservers at online.sh.cn themselves. They are on the same IP network. Incoming mail for online.sh.cn is handled by one mailserver having a total of three IP numbers. Two of them are on the same IP network. online.sh.cn has two IP numbers. They are on different IP networks.