Acutis Reverse DNS (PTR) lookup
Enter an IP address and see the hostname it maps back to. Reverse DNS answers the opposite of a normal lookup — it turns an IP into a name (the PTR record). Works for IPv4 and IPv6.
What a PTR record tells you
- A hostname comes back — the IP's owner has published reverse DNS. Mail servers often require this;
8.8.8.8resolves todns.google, for example. - No PTR record — perfectly normal for most home and many cloud IPs. Reverse DNS is optional and set by whoever controls the IP block, not by you.
- The name doesn't match forward DNS — that's common; PTR is just a label and isn't verified against the A/AAAA record unless a service checks both directions (FCrDNS).
An IP resolves — but is your network actually healthy?
Reverse DNS only tells you what a name says. Acutis Go runs the full check — network, DNS and your own machine — in 60 seconds and tells you plainly where the problem is. Free.
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Related guide: What is reverse DNS (PTR)?