DNS delegation of sinet.ad.jp updated: May 21, 2013 11:56:07 AM
Delegation
step
query
auth
servers
1
sinet.ad.jp.
.
(h,g,l,c,m,a,j,b,d,k,e,i,f).root-servers.net.
2
sinet.ad.jp.
jp.
(c,e,b,f,a,d,g).dns.jp.
3
sinet.ad.jp.
sinet.ad.jp.
(dns,jpnac).sinet.ad.jp.
We pick h.root-servers.net, one of the 13 root servers (1), and ask it about sinet.ad.jp and learn that jp is delegated to seven name servers (2), so we ask c.dns.jp where we learn that sinet.ad.jp is delegated to two name servers, including dns.sinet.ad.jp (3), so we ask that one and get the following answer:
Sinet.ad.jp is a domain controlled by two domain name servers at ad.jp having a total of four IP numbers. Two of them are on the same IP network. Incoming mail for sinet.ad.jp is handled by one mail server at securemx.jp having a total of two IP numbers. Both are on the same IP network. Sinet.ad.jp has one IP number (150.99.100.6), but the reverse is jpnac.sinet.ad.jp.