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Knowledge Base & Operational DocumentationHow to Review DNS Records Before Removing a Legacy Subdomain
11/10/2026
An old subdomain may still serve downloads, API callbacks, certificate validation, or email-related verification.
Checks to make
Check authoritative records, access logs, certificates, integrations, and business owners. Confirm no active dependencies, prepare redirects or replacements where needed, and monitor for residual requests before removing the record.
When to get help
DNS support can inventory subdomain dependencies and plan retirement. Informatix Systems can assess the symptoms, evidence, and next steps. Contact Informatix Systems to discuss this issue.