n.gtld.BIZ has no CNAME records.
Question and response
Question
dig n.gtld.BIZ. NS
Answer
The response has no answer records.
Authority
biz. 339 SOA a.gtld.biz. admin.tldns.godaddy. 1772840437 1800 300 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0