How to use this tool
Accepts IPv4 or IPv6 and queries its reverse DNS owner for PTR records. An unresolved IP is not presented as a 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
Why does the PTR target repeat the IP address?
The server-side reverse lookup can return the original IP when no hostname resolves. Treat a repeated address as no useful reverse hostname rather than a confirmed PTR name.
Who can change a PTR record?
The organization that controls the IP address normally manages reverse DNS. Contact the hosting company, cloud provider, or network owner instead of the domain registrar.
Why does my mail server need reverse DNS?
Receiving systems often consider reverse DNS when assessing a sending server. A missing or inconsistent hostname can contribute to delivery problems, but this lookup does not score reputation.
Does the tool confirm forward-confirmed reverse DNS?
No. It shows the reverse result only. You must separately resolve the returned hostname and verify that it points back to the original IP.
Can several IP addresses use the same PTR hostname?
Yes. More than one address can resolve to the same hostname. Each address still has its own reverse DNS configuration.
Why is TTL shown as a dash?
The server-side lookup returns the address and hostname without a TTL field. The table uses a dash when that cache value is unavailable.