b.itconsult-dns.org has no CNAME records.
Question and response
Question
dig b.itconsult-dns.org. NS
Answer
The response has no answer records.
Authority
itconsult-dns.org. 10800 SOA a.itconsult-dns.net. hostmaster.itconsult.net. 2806 7200 900 1814400 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0