fallback.cyberfusion.nu has no CNAME records.
Question and response
Question
dig fallback.cyberfusion.nu. NS
Answer
The response has no answer records.
Authority
cyberfusion.nu. 3263 SOA nsauth0.cyberfusion.nl. hostmaster.cyberfusion.nl. 2026022601 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0