ftp.dns2.swiftrfp.net has no CNAME records.
Question and response
Question
dig ftp.dns2.swiftrfp.net. NS
Answer
The response has no answer records.
Authority
dns2.swiftrfp.net. 9845 SOA dns2.swiftrfp.net. admin.swiftrfp.net. 2022050301 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0