ns.ctalk.com has no CNAME records.
Question and response
Question
dig ns.ctalk.com. NS
Answer
The response has no answer records.
Authority
ctalk.com. 2767 SOA ns.ctalk.com. support.connectalk.com. 2024030100 1200 180 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0