dnssec.mnemonic.no has no CNAME records.
Question and response
Question
dig dnssec.mnemonic.no. NS
Answer
The response has no answer records.
Authority
mnemonic.no. 600 SOA osl-eksterndns1.mnemonic.no. postmaster.mnemonic.no. 2026022403 7200 1800 864000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0