mail.puntointimo.net.do has no NS records.
NS records for this zone are defined at puntointimo.net.do.
NS records for this zone are defined at puntointimo.net.do.
Question and response
Question
dig mail.puntointimo.net.do. NS
Answer
The response has no answer records.
Authority
puntointimo.net.do. 1800 SOA gail.ns.cloudflare.com. dns.cloudflare.com. 2398135172 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0