DNS delegation of acropro.com updated: May 20, 2013 4:28:20 AM
Delegation
step
query
auth
servers
1
acropro.com.
.
(m,l,f,j,e,i,k,h,g,d,b,a,c).root-servers.net.
2
acropro.com.
com.
(c,e,k,a,j,b,h,l,g,m,d,f,i).gtld-servers.net.
3
acropro.com.
acropro.com.
(yns2,yns1).yahoo.com.
We pick m.root-servers.net, one of the 13 root servers (1), and ask it about acropro.com and learn that com is delegated to 13 name servers (2), so we ask c.gtld-servers.net where we learn that acropro.com is delegated to two name servers, including yns2.yahoo.com (3), so we ask that one and get the following answer:
Acropro.com is a domain controlled by two domain name servers at yahoo.com. Both are on different IP networks. Incoming mail for acropro.com is handled by two mail servers also at yahoo.com having a total of two IP numbers. There are two duplicated IP numbers. Both are on different IP networks. Acropro.com has one IP number (68.180.151.75), but the reverse is p1p-i.geo.vip.sp1.yahoo.com.
There are several thousand of host names that point only to the IP number 68.180.151.75.
Three quarter of those use the two name servers yns1 and yns2.yahoo.com together, hereafter referred to as "name server group 1", (example: theisraelofgodrc.com, drhnajafi.com and vfwpost11395.org ). Worth noting is that at least one of the domains that use name server group 1 point only to the IP number 68.180.151.75.
