Summary
ns2.ymc.ne.jp has one IP number , which also has a corresponding reverse pointer.
ns2.vtrp.net point to the same IP.
riad.jp,
h-sa.net,
ylmo.com,
e-ene.jp,
ike12.jp and at least 100 other hosts use this as a nameserver.
riad.jp,
dada.st,
qwer.jp,
kekk.jp,
slym.com and at least 100 other hosts use this as a mailserver.
ymc.ne.jp is delegated to two nameservers, however one extra nameserver is listed in the zone. All nameservers are at
ymc.ne.jp themselves. Two of them are on the same IP network. Incoming mail for
ymc.ne.jp is handled by four mailservers also at
ymc.ne.jp. Some of them are on the same IP network.
ymc.ne.jp has one IP number.
ns2.ymc.ne.jp is hosted on a server in Japan.