synacor.com has no AAAA records.
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Atlassian
Domain verification
atlassian-domain-verification=UMiS6Xxr2OmR8ncaiI49hFdNYp8LBnYLWNF5QO0bYBy8nwbHLA1ZOhi82npbsYHk
Cisco CI
Domain verification
cisco-ci-domain-verification=2d493853016b7b7cac4bc15d2ba3b9ca5fc5f99372d061e3fa9be572cb132bcd
Google
Domain verification
google-site-verification=8RAclPN5R9JTpipKyL4OlZSP3IjBgBLtpBuwbb82r_4
Google
Domain verification
google-site-verification=shn9twXwWtyyMGnDhu_Yb4FrayOPgsx_kA_Rl9eO2aM
Microsoft
Domain verification
MS=1C8A952EBA57C6E778D04D54B4E39C9FBB7710F3
Microsoft
Domain verification
MS=ms55571056
Sage Intacct
Domain verification
intacct-esk=DEAA4BE885BAF15BE0535B06A8C02E49
Zoom
Domain verification
ZOOM_verify_fqzsps5LyU5gOPgPLnS2WO
dns1.p05.nsone.net
IBM NS1
dns2.p05.nsone.net
IBM NS1
dns3.p05.nsone.net
IBM NS1
dns4.p05.nsone.net
IBM NS1
Zone apex
Start of authority
Email
Serial
1653325577
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1h
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1h