vm1976421.example.com has no CNAME records.
Question and response
Question
dig vm1976421.example.com. NS
Answer
The response has no answer records.
Authority
example.com. 526 SOA elliott.ns.cloudflare.com. dns.cloudflare.com. 2396526872 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0