Apex domains cannot have CNAME records.
Atlassian
Domain verification
atlassian-domain-verification=HRQOgazc9UsqjomJ9JWTXtyWav0pJk9YrUUcCYEvGC7Y1W948E4JeTm8KKP8Bbkd
Google
Domain verification
google-site-verification=RwOrQf1kAy8MksU4fCh5KcXJ6CT0jsg6xGPzAXNhkBU
Microsoft
Domain verification
MS=ms27502557
9b1vurcann2rkovisddm9icb2a
m5043l4fndl5qdtstof5lfnsdm
frank.ns.cloudflare.com
Cloudflare
gail.ns.cloudflare.com
Cloudflare
Zone apex
Start of authority
Email
Serial
2397261649
Refresh
2h 46m 40s
Retry
40m
Expire
7d
Negative cache TTL
30m