go
nstld.com and nstld.net use this as a mailserver. verisign.net is a domain controlled by eleven nameservers. All of them are on different IP networks. Incoming mail for verisign.net is handled by four mailservers. All of them are on the same IP network.

verisign.net
ns-soa records
 
+   AS?  
+ ---  
ns records
c2.nstld.net
+ 192.26.92.31 192.26.92.0/24 AS36625 c2.nstld.com
+ --- c2.nstld.com
d2.nstld.net
+ 192.31.80.31 192.31.80.0/24 AS36617  
+ ---  
e2.nstld.net
+ 192.12.94.31 192.12.94.0/24 AS36629 e2.nstld.com
+ --- e2.nstld.com
h2.nstld.net
+ 192.54.112.31 192.54.112.0/24 AS36623  
+ ---  
j2.nstld.net
+ 192.48.79.31 192.48.79.0/24 AS36626  
k2.nstld.net
+ 192.52.178.31 192.52.178.0/24 AS36622 k2.nstld.com
+ --- k2.nstld.com
m2.nstld.net
+ 192.55.83.31 192.55.83.0/24 AS36618 m2.nstld.com
+ --- m2.nstld.com
a2.nstld.com
+ 192.5.6.31 192.5.6.0/24 AS36625 -
+ --- -
f2.nstld.com
+ 192.35.51.31 192.35.51.0/24 AS36620 -
g2.nstld.com
+ 192.42.93.31 192.42.93.0/24 AS36624 -
l2.nstld.com
+ 192.41.162.31 192.41.162.0/24 AS36628 -
mx records
verisign.net.s6a1.psmtp.com
+ 64.18.5.10 64.18.5.0/24 AS26910 s6a1.psmtp.com
+ --- s6a1.psmtp.com
verisign.net.s6a2.psmtp.com
+ 64.18.5.11 64.18.5.0/24 AS26910 s6a2.psmtp.com
+ --- s6a2.psmtp.com
verisign.net.s6b1.psmtp.com
+ 64.18.5.13 64.18.5.0/24 AS26910 s6b1.psmtp.com
+ --- s6b1.psmtp.com
verisign.net.s6b2.psmtp.com
+ 64.18.5.14 64.18.5.0/24 AS26910 s6b2.psmtp.com
+ --- s6b2.psmtp.com
domains using this as mailserver
nstld.com
nstld.net