Apex domains cannot have CNAME records.
Atlassian
Domain verification
atlassian-domain-verification=K-gYxG/8Lc8HPaCgRqYCIk99c994F8LcZBLoSdjfUbc3Wu5KufI9/kwOQTrt4K8R
Duo
Domain verification
duo_sso_verification=gD1OT1YpoRJktxET0YOwcjGoTNiI6lmDBTXQSdpXcy1K9YVCJGVI4pCKHQ0Kgseu
Google
Domain verification
google-site-verification=1vun9BA8Orr5Pc2zDw2bGU_ApxrMlrx4AnHEB1HIYvw
Google
Domain verification
google-site-verification=4mca5QqsfbicZHDtJNJsqTEn-e-7S_90euZ3IltZS5I
Microsoft
Domain verification
MS=ms86068296
bcn=96E0565C-013B-11ED-8B16-123CC40F1FD4
amy.ns.cloudflare.com
Cloudflare
jim.ns.cloudflare.com
Cloudflare
Zone apex
Start of authority
Email
Serial
2397373460
Refresh
2h 46m 40s
Retry
40m
Expire
7d
Negative cache TTL
30m