How to use this tool
Accepts IPv4 or IPv6, shows PTR records and checks whether returned hostnames resolve back to the input IP. Optionally compare an expected hostname.
Enter the target, complete any relevant options and choose Check. Review the requested records, query outcomes and diagnostic findings. Copy Report saves the visible report.
Reading the results
No matching records and an unavailable query are different outcomes. TTLs are displayed in seconds; zero is a valid TTL. A completed request does not mean a domain passed its health checks. Only the submitted DNS owner and explicitly listed checks are inspected.
Frequently Asked Questions
Does this checker compare the result with an expected domain?
No. There is no expected-domain input or comparison result. The page displays only the reverse hostname returned for the IP.
Why is the IP repeated as Target / Value?
The server lookup can return the original address when no distinct hostname resolves. The renderer still shows that value in the PTR row.
Does the result verify forward-confirmed reverse DNS?
No. The tool does not resolve the returned hostname back to addresses for comparison.
Who controls reverse DNS for my server?
The IP address provider normally controls it. Request PTR changes through the host, cloud platform, or network operator.
Why is TTL unavailable?
The implemented server lookup does not return a TTL, so the table displays a dash.
Can a hostname result prove the mail server is trusted?
No. Reverse DNS is only one signal and this page does not test reputation, SMTP behavior, or mail authentication.