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Knowledge Base & Operational DocumentationHow to Investigate DNSSEC Validation Failures After a DNS Provider Change
11/10/2026
After changing DNS providers, some users may receive resolution failures while others see the site normally. A DNSSEC mismatch is one possible cause: the registrar's DS record may refer to keys that are no longer used by the authoritative zone.
Check the chain of trust
Confirm which nameservers are authoritative, whether the new zone is signed, and whether the registrar's DS values match the current DNSKEY. Review provider migration instructions before removing or replacing records; timing and order matter.
- Save the current zone and registrar settings.
- Coordinate DNSSEC changes with both providers.
- Use multiple validating resolvers to confirm the result.
- Monitor mail and website resolution after the change.
Informatix Systems lists domains and DNS services. A DNS review can trace delegation, signing, and validation records. Contact Informatix Systems if DNSSEC errors began after a provider move.