Registro IPv4
host: classroom.es
class: IN
ttl: 90
type: A
ip: 31.214.178.54

Servidores DNS Principal (mname) y Secundario (rname)
host: classroom.es
class: IN
ttl: 90
type: SOA
mname: ns1.dondominio.com
rname: dnsadmin.dondominio.com
serial: 2021032500
refresh: 10800
retry: 1800
expire: 691200
minimum-ttl: 3600

Información TXT
host: classroom.es
class: IN
ttl: 90
type: TXT
txt: v=spf1 include:spf.dondominio.com
entries: Array