TLSA records are part of DANE and allow a domain to publish TLS certificate associations in DNS. They are stored under the _port._proto.hostname name, such as _443._tcp.example.com. TLSA is powerful but sensitive to formatting and certificate changes. This lookup helps confirm that the correct TLSA record is published and visible across resolvers.
Common TLSA issues include using the wrong port or protocol label, mismatched certificate data, or missing DNSSEC validation. Because TLSA is used in security-sensitive flows, even small errors can cause validation to fail. Always verify the record format and update it when certificates rotate.
If you need related checks, try SSL/PKI DNS check lookup and DNSSEC lookup validator.
TLSA is published at _port._proto.hostname. For HTTPS it is usually _443._tcp.example.com.
These fields define how the TLSA record maps to the certificate. Usage defines the validation model, selector chooses the certificate part, and matching type defines the hashing.
Yes. TLSA is only meaningful when DNSSEC validates the response. Without DNSSEC, clients should not trust TLSA.
TLSA records must be updated to match the new certificate or key. If they are stale, validation fails.
Yes. Multiple records can support key rollover or alternate certificates.
Using the wrong hostname or port label is the most frequent issue, followed by incorrect hash data.