DANE (DNS-based Authentication of Named Entities) uses DNSSEC to bind TLS certificates to domain names via TLSA records. Our DANE TLSA Checker queries the DNS for TLSA records, validates their usage, and shows whether a domain has DANE enabled. This eliminates reliance on external Certificate Authorities for trust decisions.
How to Use
1Enter the domain name you want to check for DANE TLSA records.
2Click "Check" to query the DNS for TLSA records.
3View the TLSA record details and DANE status for the domain.
Use Cases
•Verify DANE TLSA records after publishing them in DNS
•Audit domains for DANE compliance and proper TLSA configuration
•Reduce CA dependency by using DANE-based certificate validation
•Troubleshoot DANE-related connection issues for email and web servers
Frequently Asked Questions
DANE (DNS-based Authentication of Named Entities) is a protocol that uses DNSSEC to associate TLS certificates with domain names, allowing administrators to specify which CA may issue certificates for their domain.
Yes, and the reason is that DANE's security rests entirely on authenticating DNS. A TLSA record that can be spoofed is worse than no DANE at all, because it would let an attacker present their own certificate and have the client accept it on the strength of an answer they forged. DNSSEC signs the zone, so a validating resolver can detect that tampering. Without a signed zone there is nothing to validate against, which is why adoption has tracked DNSSEC deployment rather than the other way round.
TLSA records contain four fields: usage (how the cert is associated), selector (which part of the cert is matched), matching type (hash type), and the certificate association data.
Moving certificate validation's anchor from the CA hierarchy into DNS. Instead of trusting any of hundreds of roots, a client validates against a hash the domain itself published, which removes the CA as a single point of compromise. For SMTP and other protocols with no application-layer security of their own that is genuinely valuable; for the web, deployment has stayed limited because browsers have other ways to manage trust.
Almost certainly because you have not configured it, and that is normal. DANE requires publishing TLSA records for each service and only helps if the connecting client is configured to enforce them. The CA/Browser Forum's TLSA records for public CAs exist so mail servers can pin the intermediate rather than the leaf, which survives renewal — if you send mail and want the benefit without managing certificates yourself, that record set is worth requesting.
No. You are relying on the CA trust model, which is what the overwhelming majority of domains do and what browsers use for the web. DANE is an alternative mechanism, not a required upgrade. What absence does mean is that if you ever add TLSA records, they are only advisory unless the connecting software is configured to enforce them — which is the detail people miss when enabling it.
Because pinning your leaf breaks on every renewal. The intermediate signs your leaf and changes far less often, so a TLSA record against the intermediate survives leaf rotation. This is exactly why the CA/Browser Forum publishes TLSA records for public CA intermediates — it gives mail operators a stable anchor without taking on renewal risk.
The usage field says how the record should be enforced — full validation, SPKI validation, or a no-op advisory record. The selector says what is being hashed: the full certificate or just its public key. Getting these wrong means a record that looks correct but never validates, so when publishing your own, follow an existing working configuration rather than constructing fields by hand.
How the Lookup Works
DANE lets a domain publish in DNS what its certificate should be, so validation can work without trusting the CA hierarchy. This page queries the TLSA records for a domain and reports what they say.
1Query the TLSA record name for port 443 using a resolver over HTTPS, so the lookup itself is encrypted and cannot be spoofed in transit. That detail matters: a DNS query for a security record must not be answerable by an on-path attacker.
2Parse each four-field record — usage, selector, matching type and the associated data — into readable form. The usage field is the part that matters most for interpretation.
3Report the count found, with no records stated plainly. Absence is the normal state for most domains, since DANE deployment remains limited even though the mechanism is in the standards.
What this shows is whether a domain publishes DANE records, not whether any particular TLS client will enforce them. That enforcement is opt-in per application, and for web traffic it remains rare — so treat records present here as intent declared rather than protection active.
Tips & Best Practices
•Use DANE to add DNS-based trust anchors for certificate validation
•Configure TLSA records correctly for your certificate chain
•Monitor DANE record validity and certificate association
•Combine DANE with DNSSEC for maximum security
Technical Details
Protocol: DNS-based Authentication of Named Entities (DANE) support TLSA: TLSA record validation and association DNSSEC: DNS Security Extensions integration Output: DANE support status with TLSA record analysis
