Summary
ns4.sphere.ad.jp has one IP number , which also has a corresponding reverse pointer.
ns2.dixy.jp,
sure-nbs.net,
ns.dai-x.net,
ns2.acule.com,
ns2.vow.co.jp and at least 23 other hosts point to the same IP.
mpw.jp,
nsl.jp,
mcof.jp,
buoy.jp,
eprn.jp and at least 100 other hosts use this as a nameserver.
jsb.co.jp use this as a mailserver.
ns4.ns4.sphere.ad.jp are subdomains to this hostname.
sphere.ad.jp is a domain controlled by three nameservers. Two of them are on the same IP network. Incoming mail for
sphere.ad.jp is handled by one mailserver at
sphere.ad.jp themselves.
sphere.ad.jp has one IP number , but the reverse is
mail.sphere.ad.jp.
ns4.sphere.ad.jp is hosted on a server in Japan.