correo.win.pe has no NS records.
NS records for this zone are defined at win.pe.
NS records for this zone are defined at win.pe.
Question and response
Question
dig correo.win.pe. NS
Answer
The response has no answer records.
Authority
win.pe. 1800 SOA dalary.ns.cloudflare.com. dns.cloudflare.com. 2398583146 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0