DNS TTL Migration Schedule Planner
Generate a fail-safe, zero-downtime DNS cutover timeline. Model pre-migration TTL reduction lead times, resolver query volume spikes, and safe post-cutover stabilization.
⏱️ Migration Parameters
📋 Execution Checklist Timeline
Frequently Asked Questions
Why must DNS TTL be reduced prior to a server or nameserver migration?
DNS resolvers worldwide cache resource records for the duration of the Time to Live (TTL) value. If your TTL is set to 86,400 seconds (24 hours), recursive resolvers will continue routing user traffic to your old infrastructure for up to a full day after you update records unless the TTL was reduced in advance.
How long before the planned cutover should TTL reduction take place?
The TTL reduction must occur at least one full cycle of the original TTL before cutover. For example, if your existing records have an 86,400s (24 hour) TTL, you must lower the TTL to 300s at least 24 to 48 hours prior to switching IP addresses or nameservers.
What is the impact of low TTL on authoritative DNS query volume?
Reducing TTL from 86,400 seconds to 300 seconds increases authoritative DNS query volume by approximately 10x to 50x because caching resolvers must re-query your nameservers much more frequently. Ensure your DNS provider handles higher query throughput during the migration window.
When should TTL be restored back to normal post-migration?
Allow 24 to 48 hours of observation post-cutover to verify stability and ensure no rollback is required. Once confirmed, restore TTL back to standard values (3,600s to 86,400s) to reduce DNS latency and lower authoritative query costs.