DNS Integrity Check
Compare DNS answers across resolvers to detect anomalies or poisoning.
What this test measures
The tool resolves the same domain through multiple resolvers and compares the returned IPs.
Consistent answers suggest normal resolution, while mismatches can indicate interference.
Signals of tampering
Private IPs, 0.0.0.0, or unexpected ASNs can point to filtering or poisoning.
Large discrepancies across resolvers often indicate cache manipulation or interception.
Poisoning vs DNS leaks
Poisoning changes the answers, while leaks change which resolver you use.
Use this together with DNS leak tests to understand both path and integrity.
How to read results
If all resolvers agree, risk is usually lower but not guaranteed to be zero.
If one resolver is different, re-test from another network to confirm.
Common causes
Captive portals, ISP filters, or enterprise gateways can alter DNS responses.
Split DNS and device caches can also produce mixed answers.
Limitations
Results are based on edge DoH resolution and may differ from your device DNS.
Repeat tests over time and across networks for a more reliable picture.