Reverse DNS / PTR
Forward DNS Records
Resolve an IP back to its hostname with ASN and network details, or look up the full set of forward DNS records for any domain — all over encrypted DNS-over-HTTPS, straight from your browser.
Reverse PTR lookups with ASN enrichment, plus eight forward record types — all resolved client-side over DNS-over-HTTPS.
Resolves an IP address back to its hostname via the PTR record, then enriches it with ASN, network range, and registry (RIR) details — useful for identifying who actually owns an address you see in logs.
Looks up A, AAAA, CNAME, MX, NS, TXT, SOA and CAA records in parallel for any domain, with toggles to include or exclude specific record types from the query.
Reverse lookups work against both IPv4 addresses and IPv6 addresses (including compressed notation), so the same tool covers dual-stack environments.
Surfaces the autonomous system number, announcing network, and organisation behind an IP — handy for quickly distinguishing cloud/hosting traffic from residential or corporate ranges.
Reads CAA records to show which certificate authorities are authorised to issue TLS certificates for a domain — a quick way to verify certificate issuance policy is configured as expected.
Lookups run client-side over encrypted DNS-over-HTTPS straight from your browser — nothing you query is logged or stored on our servers.
A reverse DNS lookup takes an IP address and returns the hostname assigned to it through its PTR record in the in-addr.arpa (IPv4) or ip6.arpa (IPv6) zone — the opposite of a forward lookup that turns a name into an IP.
PTR records are optional and are published by whoever controls the IP address reverse zone, usually the network operator. Many addresses — especially dynamic, cloud, or residential ones — have no PTR configured, so the lookup returns nothing.
Forward DNS resolves a domain name to records such as A, AAAA, MX or TXT. Reverse DNS does the opposite, resolving an IP address back to a hostname. The two are configured independently and do not have to match.
An Autonomous System Number identifies the network that announces an IP address on the internet via BGP. It tells you which organisation — an ISP, cloud provider, or enterprise — is responsible for routing that address.
Yes. Lookups run client-side over encrypted DNS-over-HTTPS straight from your browser. The tool is free, needs no sign-up, and stores nothing you query.