Reverse DNS Lookup
Resolve IP addresses to hostnames via PTR records.
Reverse DNS Lookup converts an IPv4 or IPv6 address into a hostname using PTR records (in-addr.arpa / ip6.arpa) over Cloudflare DNS-over-HTTPS.
Frequently Asked Questions
Why is there no PTR result?
Many IPs have no reverse DNS configured. That is normal for consumer connections.
IPv6 supported?
Yes. Addresses are expanded and queried under ip6.arpa.
Who answers the query?
Cloudflare DNS-over-HTTPS from your browser.