Check DNS propagation across multiple record types and compare resolvers.
Propagation issues are one of the most common DNS troubleshooting scenarios. This use case checks A, AAAA, CNAME, and NS records across multiple resolvers so you can compare how changes are spreading. Seeing differences across resolvers is often the fastest way to confirm caching behavior or partial updates.
Propagation can be delayed by high TTLs, stale caches, or misconfigured authoritative servers. It is also affected by resolver policies and geographic location. Use this combined view to identify outliers and confirm when a change is safe to announce or deploy further.
If you need related checks, try A record check tool and NS record validator.
Resolvers cache results for the TTL. If you recently changed a record, some resolvers will still return the old data until their cache expires.
No. TTL changes only apply after caches expire. Lower TTLs help future changes propagate faster.
Check at least two or three public resolvers plus your local resolver. If results differ, keep monitoring until they converge.
That usually indicates a zone synchronization problem. Ensure all authoritative servers serve the same zone and serial.
It can if TTLs are very high or caches are stale. Most changes propagate within hours when TTLs are reasonable.
The caching mechanism is the same, but CNAME chains add extra lookups and additional caching layers.