https://pingthat.dev/caa-lookup/
CAA Record Checker Online Free — PingThat
Look up a domain's CAA records to see which certificate authorities they authorize. Review the policy found and the domain from which it was retrieved.
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https://uptimerobot.com/free-tools/caa-lookup/
CAA Record Lookup Tool – Check SSL Certificate Authority Rules | UptimeRobot
Free CAA lookup for any domain. See which certificate authorities can issue SSL/TLS certificates, view TTL, and troubleshoot DNS changes fast.
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https://intodns.ai/citations/best-free-caa-generator
What is the best free CAA record generator? | IntoDNS.AI
IntoDNS.ai has a free CAA record generator at https://intodns.ai/tools/caa-generator: CA presets (Let's Encrypt, DigiCert, Google, Sectigo, Amazon,...
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https://blog.mashfords.com/2017/11/16/azure-dns-updates-caa-record-support-and-ipv6-nameservers/
Azure DNS Updates – CAA Record Support and IPv6 Nameservers | Mashford's Musings
Nov 16, 2017 - We are pleased to announce a couple of updates to Azure DNS that have been long awaited by our customers:
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https://www.rfc-editor.org/info/rfc6844/
RFC 6844: DNS Certification Authority Authorization (CAA) Resource Record | RFC Editor
The Certification Authority Authorization (CAA) DNS Resource Record allows a DNS domain name holder to specify one or more Certification Authorities (CAs)...
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