Reverse IP lookup
Enter an IPv4 or IPv6 address to find hostnames recorded against it in passive DNS. Results show a historical sample and the network announcing the address when the data was retrieved.
Free lookup No signup Powered by Profundis
One address. Multiple DNS observations.
Try130.89.148.77 Debian185.125.190.20 Ubuntu
Up to 30 A/AAAA observations, grouped by hostname.
Historical sample. Current hosting is not guaranteed.
Example addresses from observed networks
Each example is an address from a different network, taken from IP pages that search crawlers have loaded on this site. You can also paste the address you are investigating.
Hosts, observations and recorded dates
The lookup returns up to 30 A or AAAA observations from Profundis, grouped by hostname. A name such as api.example.com counts as a different host from example.com. Several observations can therefore produce fewer than 30 host rows.
Each host shows the number of returned observations and the earliest and latest timestamps within that sample. Those dates do not establish when hosting began or ended. The upstream total counts observations, including rows outside the displayed sample.
The worked example in the reverse IP guide shows how five observations become three hosts. Browse observed networks to see aggregate coverage by ASN.
Shared hosting and CDN addresses
Unrelated hosts can resolve to the same address through shared hosting, a load balancer or a CDN. An observed association does not establish common ownership, the origin server or current hosting. The ASN describes the network announcing the IP when the data was retrieved.
Check current A and AAAA records before acting on a historical result. A PTR lookup answers a separate question: which names the reverse zone publishes for an address.
Continue from an observed host
Open a hostname on Profundis to inspect its record-level DNS history. For a root domain, IP History lists its recorded addresses and DNS Timeline lists its MX, NS, TXT and CNAME records.
Public guides and network summaries are available without a search. Interactive lookups use a Cloudflare Turnstile check, visitor limits and a shared daily request budget. An empty sample does not establish that no host ever resolved to the IP.
Questions about reverse IP lookups
What is a reverse IP lookup?
A reverse IP lookup takes an IP address and returns the hostnames whose DNS A or AAAA records were recorded with that address. On this site the records come from Profundis.
How do I find the websites hosted on an IP address?
Enter the IPv4 or IPv6 address in the form at the top of this page. The result lists the hosts recorded on that address in up to 30 observations, the most recent first. These are past observations: a listed host may point to another address now.
Does a reverse IP domain check list every domain on an IP address?
No. A result holds at most 30 observations and has no further pages. It also says how many observations matched in all, exactly or as a minimum; when there are more than 30, the others can be searched on Profundis.
Do websites on the same IP address have the same owner?
Not necessarily. Shared hosting, CDNs and hosting platforms serve many unrelated customers from the same addresses. The guide to domains hosted on the same IP address describes each case.
Why does a CDN address list unrelated websites?
A CDN or reverse proxy answers for many customers from the same addresses, so the hosts recorded on one of them may have nothing else in common. Such an address can be looked up here, but this site keeps the result pages of the shared edges it recognises out of search engines.