Apex domains cannot have CNAME records.
Apple
Domain verification
apple-domain-verification=byvnYNY7MLcDK4GG
Brevo
Domain verification
brevo-code:3ff469f7d4862443a10fe4fd47070b3c
Cisco CI
Domain verification
cisco-ci-domain-verification=7497da41007e7e547d5ec9e763dd6a0638393d81759437dc78a63454a32fe17e
Duo
Domain verification
duo_sso_verification=LNuzsJl8EwO3tZSKwsEpIESfv92LSTEPSxdY1YN2CjyIw9WkyHKP3LAe6Qzb5SXD
Google
Domain verification
google-site-verification=6RKLXK4Is8wvih9m6UduAS4WQ5RTEQCIJrF_8BIm-y4
Klaviyo
Domain verification
klaviyo-site-verification=W5jMXs
Microsoft
Domain verification
MS=ms61035034
Zoho
Domain verification
zoho-verification=zb82808146.zmverify.zoho.in
fm3k1g8xvzjnq65g77ndz348lzd0j8z2
kaa4cachm8s0rp8kkjsoej31rc
ns1-05.azure-dns.com
Microsoft Azure
ns2-05.azure-dns.net
Microsoft Azure
ns3-05.azure-dns.org
Microsoft Azure
ns4-05.azure-dns.info
Microsoft Azure
Zone apex
Start of authority
Email
Serial
1571928099
Refresh
1h
Retry
10m
Expire
7d
Negative cache TTL
30m