nx2.servidoro.com has no NS records.
NS records for this zone are defined at servidoro.com.
NS records for this zone are defined at servidoro.com.
Question and response
Question
dig nx2.servidoro.com. NS
Answer
The response has no answer records.
Authority
servidoro.com. 1800 SOA matt.ns.cloudflare.com. dns.cloudflare.com. 2397432174 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0