How to Plan a DNS Change When Some Customers Use Cached Records

A DNS update reaches resolvers at different times, so clients can continue using old addresses after the authoritative record changes.

Checks to make

Check current TTL well before the change, lower it in advance where appropriate, verify both old and new endpoints during transition, and keep the old service available through the cache window. Restore TTL after stable resolution.

When to get help

DNS planning support can sequence migrations and monitor propagation. Informatix Systems can assess the symptoms, evidence, and next steps. Contact Informatix Systems to discuss this issue.