*.abx.bz has one IP number , which is the same as for abx.bz, but the reverse is users31.heteml.jp. 3fl.jp, abx.bz, jsf.net, iida.fm, s-4g.com and at least 99 other hosts point to the same IP. abx.bz is a domain controlled by two nameservers at heteml.jp. They are on the same IP network. Incoming mail for abx.bz is handled by one mailserver also at heteml.jp. *.abx.bz is hosted on a server in Japan even though the hostname implies Belize.