fbl.ungapped.com has no CNAME records.
Question and response
Question
dig fbl.ungapped.com. NS
Answer
The response has no answer records.
Authority
ungapped.com. 3316 SOA ns1.loopia.se. registry.loopia.se. 1772064000 14400 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0