DNS CAA Record Lookup
Look up CAA records and explain authorized certificate issuers.
CAA (Certification Authority Authorization) records tell browsers and CAs which certificate authorities are allowed to issue certificates for your domain. No CAA record means any CA may issue. Queried live over Cloudflare DNS-over-HTTPS.
About this tool
DNS CAA Record Lookup is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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