Registro IPv4
host: sigrad.se
class: IN
ttl: 3600
type: A
ip: 192.121.241.53

Servidores DNS Principal (mname) y Secundario (rname)
host: sigrad.se
class: IN
ttl: 3600
type: SOA
mname: ns1.sigrad.se
rname: hostmaster.sigrad.se
serial: 1
refresh: 10800
retry: 3600
expire: 604800
minimum-ttl: 3600