smtpa.netcabo.pt has no NS records.
NS records for this zone are defined at netcabo.pt.
NS records for this zone are defined at netcabo.pt.
Question and response
Question
dig smtpa.netcabo.pt. NS
Answer
The response has no answer records.
Authority
netcabo.pt. 1800 SOA kianchau.ns.cloudflare.com. dns.cloudflare.com. 2397141305 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0