Reverse IP lookup

Free Reverse IP Lookup — Find Domains Hosted on an IP

A reverse IP lookup works backwards from an IP address to the domain or domains associated with it. Enter an IP and this tool shows you which hostnames point to that server — revealing whether a site sits alone or shares its IP with many neighbors.

This is especially useful for understanding shared hosting. On budget shared plans, hundreds or even thousands of unrelated sites can live on one IP. That's usually fine, but it can occasionally matter: if a neighbor on the same IP is sending spam or hosting malware, it can affect the IP's reputation, which mainly impacts email deliverability. For SEO, the long-debunked "bad neighborhood" penalty isn't a real ranking concern, but knowing whether you're on dedicated or crowded shared infrastructure is still useful context for performance and reliability.

Use this tool to see whether your site is on shared or dedicated hosting, to investigate an IP that's appearing in your logs, to map out a network's footprint during research, or to confirm a dedicated IP you're paying for is actually dedicated. It turns a bare IP into a list of the domains living behind it.

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