sftp.voicearchive.com has no CNAME records.
Question and response
Question
dig sftp.voicearchive.com. NS
Answer
The response has no answer records.
Authority
voicearchive.com. 18 SOA ns.wannafind.dk. hostmaster.wannafind.dk. 2025112001 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0