Free · without registration
Compare DNS stands before and after a move
Secure a DNS snapshot before moving and then capture a second booth. Compare records, DNS status, and TTLs to distinguish intentional changes from overlooked entries.
Prepare DNS snapshots
Their results
Secure a comprehensible stand before moving
Enter the domain, up to four relative names and the desired record types. @ stands for the main domain, www for www.example.org. The specification includes @, www and _dmarc. Select a maximum of 24 combinations of names and types. Capture the previous status and download it as JSON before changing DNS settings.
Capture the post stand under the same conditions
After the changeover, you collect the same names and types if possible with the same resolver. Already stored Seitenreport snapshots can be imported locally. The domain must match in both files. The tool does not store snapshots on the server and does not make any DNS changes itself.
Targeted control of new and removed values
The comparison shows added and no longer included records. A new web IP is often desired when changing hosting; a missing MX record, on the other hand, can be unintended if the domain is to continue receiving emails. Check TXT values for SPF and service verifications. You must expressly add DKIM selectors as relative names, because they are not reliably automatically findable.
Incomplete queries remain open
If a type was queried only in a snapshot or a call failed, it is not comparable in the result. The tool then does not claim that records have been deleted. Changes to the remaining cache-TTL are reported separately. A snapshot of selected DNS names is not a complete export of a DNS zone.
Snapshot Comparison and Nameserver Change
This implementation compares DNS responses of public resolvers at two points in time. It does not directly query freely entered authoritative nameservers. During a nameserver change, caches can therefore still deliver old states. Complete the comparison with the propagation check and check the target configuration in your DNS management area.
Example of classification
The A address has changed as planned, the MX record has remained the same. A previously existing verification TXT is now missing. The comparison shows all three cases separately and does not require correction of the intended A-change.
Frequent questions
Can I retrieve previous DNS booths without snapshot?
No. This tool does not have a historical DNS database. Capture and export the before status before the change.
Are all subdomains automatically found?
No. Only the specified names and types are queried. Add relevant subdomains and DKIM selectors specifically.
Can I test any two nameservers directly?
This version compares snapshots of public resolvers. Direct queries of freely selectable name servers are not included.