Registro IPv4
host: a123systems.ru
class: IN
ttl: 90
type: A
ip: 92.100.154.231

Servidores DNS Principal (mname) y Secundario (rname)
host: a123systems.ru
class: IN
ttl: 90
type: SOA
mname: a123systems.ru
rname: root.a123systems.ru
serial: 1729206543
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 1800

Servidor de Correo
host: a123systems.ru
class: IN
ttl: 90
type: MX
pri: 10
target: mx.yandex.net