DNS delegation of tec-net.jp updated: May 25, 2013 12:48:50 PM
Delegation
step
query
auth
servers
1
tec-net.jp.
.
(h,a,k,m,d,c,e,i,f,l,j,g,b).root-servers.net.
2
tec-net.jp.
jp.
(e,c,d,f,a,b,g).dns.jp.
3
tec-net.jp.
tec-net.jp.
(01,02).dnsv.jp.
We pick h.root-servers.net, one of the 13 root servers (1), and ask it about tec-net.jp and learn that jp is delegated to seven name servers (2), so we ask e.dns.jp where we learn that tec-net.jp is delegated to two name servers, including 01.dnsv.jp (3), so we ask that one and get the following answer:
Tec-net.jp is a domain controlled by two domain name servers at dnsv.jp. Both are on different IP networks. Incoming mail for tec-net.jp is handled by four mail servers at psmtp.com. All three of them are on the same IP network. We are missing the IP:s of one server: tec-net.jp.s9a1.psmtp.com. Tec-net.jp has one IP number (1.33.191.243).
All of the several thousand of domains that use the primary name server 01.dnsv.jp use name server group 1 (example: himawariclinic.net, i9j55m82.info and kobedenshi.net ). Worth noting is that a third of the domains that use name server group 1 use the primary name server 01.dnsv.jp.
The two name servers 01 and 02.dnsv.jp together
There are several thousand of domains that use name server group 1.
A third of those use the primary name server 01.dnsv.jp (example: ssggss.net, aluntan.com and aspesi.co.jp ). Worth noting is that all of the domains that use the primary name server 01.dnsv.jp use name server group 1.
