Servidores DNS Principal (mname) y Secundario (rname)
host: githubusercontent.com
class: IN
ttl: 900
type: SOA
mname: ns-1411.awsdns-48.org
rname: awsdns-hostmaster.amazon.com
serial: 1
refresh: 7200
retry: 900
expire: 1209600
minimum-ttl: 86400

Información TXT
host: githubusercontent.com
class: IN
ttl: 30
type: TXT
txt: globalsign-domain-verification=2wiwCKYW7kQ6LJntfIcdi5EG56lUlQIRj_VGJnEEKb
entries: Array

Información TXT
host: githubusercontent.com
class: IN
ttl: 30
type: TXT
txt: v=spf1 a -all
entries: Array