si.dns.eu has no CNAME records.
Question and response
Question
dig si.dns.eu. NS
Answer
The response has no answer records.
Authority
eu. 600 SOA si.dns.eu. tech.eurid.eu. 1122036900 3600 1800 3600000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0