What this tool does
Type a domain and the tool returns the public IPv4 and IPv6 addresses it resolves to, along with a reverse DNS hostname for each address where one exists, and a lookup time.
What the result tells you
- An IPv4 address (
Arecord) and an IPv6 address (AAAArecord) when the domain has both. - The reverse DNS name (PTR) of the address. It often reveals the hosting provider, for example a name ending in the host’s domain. It can also be blank, because many addresses have no PTR record.
Why it often isn’t the “real” server
Many sites sit behind a CDN or reverse proxy such as Cloudflare. In that case the address you see belongs to the proxy, not to the origin server. That is by design. Two lookups can also return different addresses, because large sites rotate or geo-balance their records.
Limits and safeguards
The lookup runs on this site’s server. To stop the tool being used to probe internal networks, domains that resolve only to private, loopback or link-local addresses are rejected with a message that no public records were found.
Results are cached for 30 minutes and you can make up to 20 lookups a minute.
What to do with the IP
Check that a DNS change points at the right host, confirm that a domain isn’t still on an old server after a migration, or copy the address into a firewall allowlist. If you want to know who runs that address, Hosting Checker goes a step further.
Why does the IP not match my hosting server?
If the site uses a CDN or proxy, you see the proxy’s address. The origin IP is hidden on purpose.
Why is the reverse DNS blank?
Not every IP has a PTR record. It is up to whoever owns the address range.
Why was my domain rejected?
If the domain resolves only to private or internal addresses, the tool refuses to return them.
Can it look up several domains at once?
One domain per lookup.
Does it show IPv6 addresses?
Yes. When the domain has an AAAA record, the IPv6 address is listed next to the IPv4 address.