Registro IPv4
host: Webmath.ru
class: IN
ttl: 120
type: A
ip: 201.51.4.148

Servidores DNS Principal (mname) y Secundario (rname)
host: Webmath.ru
class: IN
ttl: 1545
type: SOA
mname: chin.ns.cloudflare.com
rname: dns.cloudflare.com
serial: 2411419618
refresh: 10000
retry: 2400
expire: 604800
minimum-ttl: 1800