ns1.merula.net has no CNAME records.
Question and response
Question
dig ns1.merula.net. NS
Answer
The response has no answer records.
Authority
merula.net. 4444 SOA ns1.merula.net. hostmaster.merula.net. 2026011101 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0