DNS delegation of postini.us updated: May 19, 2013 6:44:17 AM
Delegation
step
query
auth
servers
1
postini.us.
.
(d,b,k,g,e,a,h,j,l,m,c,i,f).root-servers.net.
2
postini.us.
us.
(c,f,a,e,b,k).cctld.us.
3
postini.us.
postini.us.
(ns27,ns28).1and1.com.
We pick d.root-servers.net, one of the 13 root servers (1), and ask it about postini.us and learn that us is delegated to six name servers (2), so we ask c.cctld.us where we learn that postini.us is delegated to two name servers, including ns27.1and1.com (3), so we ask that one and get the following answer:
Postini.us is a domain controlled by two domain name servers at 1and1.com having a total of four IP numbers. Some of them are on the same IP network. Incoming mail for postini.us is handled by one mail server at onlinehome.us. Postini.us has one IP number (74.208.31.253), but the reverse is perfora.net.