Reverse IP Lookup
Enter an IPv4 address to find domains and hostnames associated with the same IP.
What is a reverse IP lookup?
A reverse IP lookup searches for domains or hostnames that have been observed using a particular IP address. It is useful when you know an IPv4 address and want to understand which websites or DNS names may be associated with the same server or hosting infrastructure.
Unlike reverse DNS, which checks the PTR record assigned to an IP address, reverse IP data can include multiple domains associated with the same address. Shared hosting, content delivery networks and cloud infrastructure can cause many unrelated domains to appear behind one IP.
How to use Reverse IP Lookup
- Enter the IPv4 address you want to investigate.
- Run the reverse IP search.
- Review the domains or hostnames found in available DNS intelligence data.
How to interpret reverse IP results
A listed domain indicates that DNS or external intelligence data has associated that hostname with the searched IP address. It does not prove that every domain is currently hosted there, because DNS records and hosting configurations can change.
Results may also be incomplete. Some domains use proxy networks, CDNs or load balancers that obscure their origin server, while other hosts may have changed IP addresses since the underlying dataset was updated.
Common uses for reverse IP lookup
- Discover domains that may share the same hosting server.
- Investigate an unfamiliar server seen in network logs.
- Research hosting relationships between websites.
- Find additional hostnames connected with an IP during infrastructure analysis.
- Compare reverse IP data with DNS and WHOIS information.