Apex domains cannot have CNAME records.
Cloudflare
Internal use
ca3-02af925387664f7db0d4f5adda944551
Google
Domain verification
google-site-verification=UuxnNSq-44gV_2d-qia5O6el_3gPWnxg1PonnbyPrNs
KnowBe4
Domain verification
knowbe4-site-verification=8e37246f1dbf372931f0101955c4a1e3
Microsoft
Domain verification
MS=ms23950514
asa.ns.cloudflare.com
Cloudflare
clint.ns.cloudflare.com
Cloudflare
Zone apex
Start of authority
Email
Serial
2396006312
Refresh
2h 46m 40s
Retry
40m
Expire
7d
Negative cache TTL
30m