Servidores DNS Principal (mname) y Secundario (rname)
host: upc.es
class: IN
ttl: 21600
type: SOA
mname: ns.upc.edu
rname: hostmaster.upcnet.es
serial: 2019130749
refresh: 1800
retry: 900
expire: 1814400
minimum-ttl: 7200

Servidor de Correo
host: upc.es
class: IN
ttl: 21194
type: MX
pri: 10
target: mx2.upc.es

Servidor de Correo
host: upc.es
class: IN
ttl: 21194
type: MX
pri: 10
target: mx1.upc.es