b.nic.work has no CNAME records.
Question and response
Question
dig b.nic.work. NS
Answer
The response has no answer records.
Authority
nic.work. 326 SOA a.nic.work. admin.tldns.godaddy. 1771947988 1800 300 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0