nonexistent.punktum.dk has no CNAME records.
Question and response
Question
dig nonexistent.punktum.dk. NS
Answer
The response has no answer records.
Authority
punktum.dk. 193 SOA auth01.ns.dk-hostmaster.dk. tech.punktum.dk. 2026022501 14400 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0