Reverse IP Lookup
Find all domains hosted on the same IP address. Enter a domain or IP to discover co-hosted websites.
Reverse IP Lookup Features
Discover all websites sharing the same server IP address.
Multi-Source Lookup
Combines DNS reverse lookups with external databases to find as many co-hosted domains as possible for the target IP.
Shared Hosting Detection
Identify how many websites share the same server. Useful for assessing hosting density and potential performance impact.
Security Reconnaissance
Discover neighboring sites on the same IP — a critical step in security assessments and penetration testing.
Searchable Results
Instantly filter through discovered domains with a live search. Quickly find specific patterns in large result sets.
How It Works
Three steps to find all domains on any IP address.
Enter Domain or IP
Type a domain name or IP address. If you enter a domain, we resolve it to its IP address first.
Query Multiple Sources
We perform DNS reverse lookups and query external databases to find all domains pointing to that IP.
Browse Results
View the full list of co-hosted domains, search through them, and assess the server's hosting profile.
Related Tools
More tools to investigate domains and web infrastructure.
Frequently Asked Questions
Common questions about reverse IP lookups.
What is a reverse IP lookup?
A reverse IP lookup finds all domain names hosted on a specific IP address. Instead of the usual domain-to-IP lookup, it works in reverse — starting from an IP and discovering which websites are configured to use it. This reveals all sites sharing the same server.
Why would I use a reverse IP lookup?
Reverse IP lookups are useful for security assessments (finding what else is on a server), competitive research (discovering other sites a company hosts), evaluating shared hosting density, and identifying potentially malicious neighbor sites that could affect your IP reputation.
Why might some domains not be found?
Not all domains can be discovered through reverse lookups. Sites using CDNs like Cloudflare hide their origin IP. Additionally, some hosting providers don't configure reverse DNS records, and external databases may not have indexed every domain on a given IP.
Does a reverse IP lookup show all domains on a server?
Not necessarily. The results depend on the data sources available. DNS reverse records only show domains with PTR records configured, and external databases index domains over time. Virtual hosts, recent additions, and sites behind proxies may not appear in results.