Reverse IP lookup
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Find names observed on an IP. Shared hosting does not imply common ownership.
Frequently asked questions
From recorded DNS answers: the names whose A or AAAA record pointed to the address. It is not a PTR (reverse DNS) lookup, and nothing is queried live.
Not necessarily. Shared hosting and CDNs put many unrelated sites on one address. Check a name in Host lookup or WHOIS lookup before concluding that they are related.
No, one address at a time. ASN lookup lists the prefixes of a network, and IP lookup adds the services and certificates seen on an address.
1 credit per page of results for the first three pages, a little more after that.