DNS delegation of nullyahoo.com updated: Jun 19, 2013 6:37:18 PM
Delegation
step
query
auth
servers
1
nullyahoo.com.
.
(j,i,b,m,a,h,f,l,c,k,e,d,g).root-servers.net.
2
nullyahoo.com.
com.
(f,l,i,m,c,a,b,e,j,h,g,d,k).gtld-servers.net.
3
nullyahoo.com.
nullyahoo.com.
(ns1,ns3,ns5,ns2).yahoo.com.
We pick j.root-servers.net, one of the 13 root servers (1), and ask it about nullyahoo.com and learn that com is delegated to 13 name servers (2), so we ask f.gtld-servers.net where we learn that nullyahoo.com is delegated to four name servers, including ns1.yahoo.com (3), so we ask that one and get the following answer:
Nullyahoo.com is a domain controlled by four domain name servers at yahoo.com. All four of them are on different IP networks. Incoming mail for nullyahoo.com is handled by one mail server at .. We are missing the IP:s of one server: .. Nullyahoo.com 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 2 use only the mail server . (example: the9ontv.com, altavispa.com and yahoomen.com ). Worth noting is that one percent of the domains that only use the mail server . use name server group 2.