Registro IPv4
host: cdnextra.edu.pl
class: IN
ttl: 90
type: A
ip: 103.211.100.211

Registro IPv4
host: cdnextra.edu.pl
class: IN
ttl: 90
type: A
ip: 103.211.100.3

Servidores DNS Principal (mname) y Secundario (rname)
host: cdnextra.edu.pl
class: IN
ttl: 1800
type: SOA
mname: gordon.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2390535099
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800