ns3.host.az has no CNAME records.
Question and response
Question
dig ns3.host.az. NS
Answer
The response has no answer records.
Authority
host.az. 10800 SOA ns1.host.az. support.intrans.baku.az. 2026020501 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0