ns2.nosmadeira.com has no CNAME records.
Question and response
Question
dig ns2.nosmadeira.com. NS
Answer
The response has no answer records.
Authority
nosmadeira.com. 2152 SOA ns1.nosmadeira.com. hostmaster.cabotvm.pt. 2026020600 21600 3600 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0