Check how a DNS record resolves across multiple public resolvers in one place. This tool helps you verify whether a recent DNS change has propagated consistently or whether different resolvers still return different answers.
It is useful for domain changes, migrations, cutovers, CDN updates, mail record changes, and troubleshooting cases where one network sees the new record and another still sees the old one.
See which public resolvers still return the old record.
Server lookup, rate limited| Resolver | Status | Answer | Match | Notes |
|---|
How to use
- Enter the domain name you want to check.
- Select the DNS record type such as A, AAAA, MX, TXT, NS, or CNAME.
- Optionally enter an expected value if you want to verify a specific record result.
- Click Check propagation to compare answers across public resolvers.
- Review the summary and resolver table to see whether the record is fully propagated or still mixed.
FAQ
What does this tool actually check?
It queries the same DNS record against multiple public resolvers and compares the answers. This helps you see whether propagation is consistent or still split across providers.
Why do different resolvers show different results?
Resolvers cache DNS answers for different periods based on TTL and their own refresh timing. After a DNS change, some resolvers may return the new value while others still return the old one for a while.
Should I use an expected value?
Use an expected value when you already know what the new record should be. It makes the result easier to read because the tool can mark which resolvers already match that exact value.
Does this replace a full DNS lookup tool?
No. This tool is focused on propagation comparison across resolvers. For broader DNS inspection and PTR lookups, use the DNS lookup tool.
Practical examples
- Check whether a new
Arecord has propagated after moving a website to a new server. - Verify whether updated
MXrecords are visible across resolvers before switching mail flow. - Confirm whether a
TXTrecord for domain verification is consistently published. - Compare
CNAMEanswers after a CDN or reverse proxy change.
Related guides and tools
Related guides
- nslookup in Windows: DNS troubleshooting from basic queries to AD diagnostics - resolving the same records from the Windows command line
- ipconfig command in Windows: beyond /all - reading the local adapter configuration behind these values