Post-change verification
Confirm whether your new record is visible beyond the one resolver you normally test.
DNS Propagation Checker
Compare DNS answers across several public resolvers.
Dev + Network
Compares the same query through several public DNS resolvers so you can spot mixed answers faster.
Tip: double-click any visible result to copy it to your clipboard.
DNS rollout
Check whether a DNS change has really spread instead of trusting one resolver.
Propagation questions usually start after a record change but before caches agree. This page compares the same lookup across several public resolvers so mixed answers stand out fast.
Highlights
- Checks the same DNS name through several public resolvers.
- Useful after A, MX, TXT, CNAME, and NS changes.
- Optional expected value helps confirm whether the new answer is visible yet.
Mixed-answer spotting
See quickly when one resolver is updated and another is still serving the old value.
Support-ready summary
Copy the resolver snapshot into a ticket when you need proof that propagation is still in progress.
How to use it
One resolver is not enough when caches are still moving.
01
Enter name and type
Choose the exact hostname and record type you changed.
02
Run the propagation check
Tooloh queries several public resolvers in parallel.
03
Compare the answers
Use agreement and expected-value matching to see whether the rollout is actually complete.
Related tools
Same vibe. Same speed.
DNS Lookup
Dev + Network
Lookup DNS records (A, AAAA, CNAME, MX, TXT).
MX Lookup
Dev + Network
Check mail exchanger records for a domain.
SPF Checker
Dev + Network
Find and inspect the SPF policy on a domain.
SSL Checker
Dev + Network
Check certificate status, expiry, and HTTPS reachability.
FAQ
Quick answers. No walls of text.
What does propagation mean here?
It means different public resolvers may still disagree while DNS caches expire and refresh after a change.
Why are some answers mixed?
Resolvers may have different cache ages, upstream paths, or stale answers for a while after updates.
Does this show every resolver in the world?
No. It compares several major public resolvers to give you a practical propagation snapshot.