go
ns1.srvz.ru has one IP number , which is the same as for srvz.ru, but the reverse is nuclear.decay.ru. srvz.ru, zarub.org, mail.zarub.org and nuclear.decay.ru point to the same IP. srvz.ru use this as a nameserver. srvz.ru is a domain controlled by two nameservers at srvz.ru themselves. They are on different IP networks. Incoming mail for srvz.ru is handled by one mailserver at zarub.org. ns1.srvz.ru is hosted on a server in Russian Federation.

ns1.srvz.ru
a records
 
+ 85.118.226.109 85.118.224.0/21 AS35018 nuclear.decay.ru
+ --- nuclear.decay.ru

srvz.ru
a records
 
+ 85.118.226.109 85.118.224.0/21 AS35018 nuclear.decay.ru
+ --- nuclear.decay.ru
ns-soa records
srvz.ru
+ 85.118.226.109 85.118.224.0/21 AS35018 nuclear.decay.ru
+ --- nuclear.decay.ru
ns records
ns1.srvz.ru
+ 85.118.226.109 85.118.224.0/21 AS35018 nuclear.decay.ru
+ --- nuclear.decay.ru
ns2.srvz.ru
+ 193.124.39.135 193.124.39.0/24 AS5387 str.che.nsk.su
+ --- str.che.nsk.su
mx records
mail.zarub.org
+ 85.118.226.109 85.118.224.0/21 AS35018 nuclear.decay.ru
+ --- nuclear.decay.ru
ip numbers of host
85.118.226.109
ptrs of ip numbers
nuclear.decay.ru
hostnames sharing ip with a-records
mail.zarub.org
nuclear.decay.ru
srvz.ru
zarub.org
domains using this as nameserver
srvz.ru
domains using this as nameserver under another name
zarub.org
domains using this as mailserver under another name
srvz.ru
zarub.org