DNS delegation of yahoo.com.co updated: May 24, 2013 8:30:26 AM
Delegation
step
query
auth
servers
1
yahoo.com.co.
.
(c,d,e,k,h,a,j,l,g,b,i,m,f).root-servers.net.
2
yahoo.com.co.
co.
(ns1,ns3,ns5,ns6,ns4,ns2).cctld.co.
3
yahoo.com.co.
yahoo.com.co.
(ns3,ns1,ns5).yahoo.com.
We pick c.root-servers.net, one of the 13 root servers (1), and ask it about yahoo.com.co and learn that co is delegated to six name servers (2), so we ask ns1.cctld.co where we learn that yahoo.com.co is delegated to three name servers, including ns3.yahoo.com (3), so we ask that one and get the following answer:
Yahoo.com.co is a domain controlled by five domain name servers at yahoo.com. All five of them are on different IP networks. Incoming mail for yahoo.com.co is handled by three mail servers at yahoodns.net having a total of 16 IP numbers. There are 32 duplicated IP numbers. Some of them are on the same IP network. Yahoo.com.co has two IP numbers (68.180.206.184, 98.139.102.145). Both are on different IP networks.
The five name servers ns1, ns2, ns3, ns4 and ns5.yahoo.com together
Two thirds of the several thousand of domains that use name server group 1 point to IP group 1 (example: yahoo-inc.us, yahoocalandar.com and yahoomusicviedo.com ). Worth noting is that three quarter of the host names that point to IP group 1 use name server group 1.
