Registro IPv4
host: ljwbbs.com
class: IN
ttl: 300
type: A
ip: 50.2.90.33

Servidores DNS Principal (mname) y Secundario (rname)
host: ljwbbs.com
class: IN
ttl: 7200
type: SOA
mname: n1.xundns.com
rname: nsadmin.xundns.com
serial: 437896
refresh: 3600
retry: 600
expire: 86400
minimum-ttl: 600