DNS delegation of up.mx updated: May 20, 2013 8:59:34 AM
Delegation
step
query
auth
servers
1
up.mx.
.
(b,f,k,a,j,e,h,m,i,c,d,g,l).root-servers.net.
2
up.mx.
mx.
(i,o,m,x,c,e).mx-ns.mx.
3
up.mx.
up.mx.
(dns1,dns2,dns3).up.mx.
We pick b.root-servers.net, one of the 13 root servers (1), and ask it about up.mx and learn that mx is delegated to six name servers (2), so we ask i.mx-ns.mx where we learn that up.mx is delegated to three name servers, including dns1.up.mx (3), so we ask that one and get the following answer:
Up.mx is a domain controlled by five domain name servers at up.mx themselves. We are missing the IP:s of five servers: gdl1.up.mx, gdl2.up.mx, mex2.up.mx, mex1.up.mx and ags1.up.mx. Incoming mail for up.mx is handled by seven mail servers at googlemail.com and google.com having a total of 57 IP numbers. There are 33 duplicated IP numbers. Some of them are on the same IP network.