clickmeeting.com has no AAAA records.
Apex domains cannot have CNAME records.
Apple
Domain verification
apple-domain-verification=yVHqwIr1ngrrpK7b
CERT Polska
Domain verification
mojecertpl-site-verification-jAEZiXKzq2QhIS6N2EaPMKmPT5rKaKI1
Facebook
Domain verification
facebook-domain-verification=4y1a38qwk9rznoz5ombacql1h8v3nf
Google
Domain verification
google-site-verification=WV_6H5eazmsoQpPrTBrjV5UNhdeQfeHX_X6svmGwWvo
HubSpot
Single sign-on
hubspot-developer-verification=M2UxMWQ5YzctNGM0NC00YzhlLWJmOGQtOGM5ZDhkNjE5MDhl
Microsoft
Domain verification
ms-domain-verification=5c957f1e-f063-4429-a872-991753fd7f72
Microsoft
Domain verification
MS=ms72523053
4ad8017ecf6a1b633ac0c4f5431d5cee083e3b865d698a98349dfc3361908f5
Zone apex
Start of authority
Email
Serial
2015011122
Refresh
12h
Retry
1h
Expire
14d
Negative cache TTL
3m