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Global DNS checker

See what DNS resolvers return, fast.

Check a domain across multiple DNS resolvers, spot differences and compare the result with authoritative DNS.

URLs are cleaned automatically. PTR checks accept IPv4 and IPv6 addresses.
Enter the new DNS value during a change. DNSReach marks resolver answers as matching or different and calculates propagation progress.

Results for

Resolver agreement
Geographic DNS view
Differences
Average response

Global DNS view

See where DNS answers come from without pretending an anycast address belongs to one fixed city.

World map World map
No located DNS sources yetAdd a country or coordinates to a resolver, or connect geographic nodes. Anycast resolvers appear in the global rail below.
Geographic probe
Located resolver
✓ Matching
≠ Different
◷ Timeout
! DNS error
↩ Refused
× Unavailable

Global / Anycast resolvers

Global resolver networks are shown here without assigning them a false fixed city.

Geographic Nodes

Real DNS queries originating from your connected node locations

No nodes

Authoritative DNS

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Consensus—

Results by returned value

Consensus first

Recent searches

Analysis

Plain-English interpretation of this lookup

Propagation

Compare resolver results with an expected value

Share & export

Send or save the current result

Resolver details

Select a summary, map source or filter to reach the relevant result quickly.

Manage resolvers

What DNSReach checks

Resolver agreement

Compare answers from Google, Cloudflare, Quad9, OpenDNS and any resolver you add.

Authoritative DNS

Compare cached resolver answers with the DNS servers responsible for the domain.

Propagation progress

Enter an expected value to see which resolvers already return the new record.