ns03.2is.nl has no CNAME records.
Question and response
Question
dig ns03.2is.nl. NS
Answer
The response has no answer records.
Authority
2is.nl. 2668 SOA nsplus5.2is.nl. domain-admin.2is.nl. 2026030502 14400 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0