mail.betcris.net.do has no NS records.
NS records for this zone are defined at betcris.net.do.
NS records for this zone are defined at betcris.net.do.
Question and response
Question
dig mail.betcris.net.do. NS
Answer
The response has no answer records.
Authority
betcris.net.do. 1800 SOA cass.ns.cloudflare.com. dns.cloudflare.com. 2398844126 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0