c40.starfall.com has no CNAME records.
Question and response
Question
dig c40.starfall.com. NS
Answer
The response has no answer records.
Authority
starfall.com. 31 SOA ns0.pancil.net. sysroot.pancil.net. 2026012602 3600 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0