Reverse IP Lookup
Find all domains hosted on the same IP address.
Enter a public IP address to discover all domains hosted on the same server.
What Is a Reverse IP Lookup?
A reverse IP lookup identifies all domain names hosted on the same IP address. When multiple websites share a server (common in shared hosting), they all resolve to the same IP. By querying databases of DNS records, a reverse IP lookup reveals these neighbors — giving you a complete picture of what else lives on that server.
Why Use Reverse IP Lookup?
Security professionals use reverse IP lookups to assess risk. If one site on a shared server is compromised, others may be vulnerable. Knowing your hosting neighbors helps you evaluate whether your server environment is secure. It is also useful for competitive analysis — discovering which sites share infrastructure can reveal hosting choices and resource allocation patterns.
How It Works
This tool queries a comprehensive database of domain-to-IP mappings. When you enter an IP address, it searches for all domains whose DNS A records point to that address. The results show every domain currently resolving to that IP, along with a total count. Note that results depend on the database's coverage — very new or obscure domains may not appear immediately.
Common Use Cases
Web developers check reverse IP to understand shared hosting density. Penetration testers map server infrastructure during reconnaissance. SEO specialists investigate whether bad neighbors could affect search rankings. System administrators verify that only expected domains are pointing to their servers. If you see unexpected domains on your IP, it could indicate misconfiguration or unauthorized use.