Reverse IP Lookup
Find all domains hosted on the same IP address. Useful for investigating shared hosting, CDN endpoints, and co-hosted malicious sites.
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View All Tools →What Is Reverse IP Lookup?
A reverse IP lookup is a technique used to find all domain names hosted on a single IP address. Instead of resolving a domain to an IP (DNS lookup), this tool does the opposite, it shows which websites are connected to the same server or hosting infrastructure.
This reverse IP lookup tool queries DNS and hosting data to identify domains that share the same IP. It is widely used in cybersecurity, SEO analysis, and network investigations to uncover relationships between websites.
How Reverse IP Lookup Works
When a domain is hosted online, it is mapped to an IP address using DNS (Domain Name System). Multiple domains can point to the same IP, especially in shared hosting environments or content delivery networks (CDNs).
A reverse IP lookup searches DNS records and historical data to list all domains associated with a given IP address. This helps you find domains hosted on the same IP quickly and efficiently.
Why Use a Reverse IP Lookup Tool?
There are many practical use cases for performing a reverse IP search:
- Identify all websites hosted on a shared server
- Detect suspicious or malicious domains on the same IP
- Analyze competitor hosting infrastructure
- Investigate phishing or spam campaigns
- Understand CDN and cloud hosting setups
Reverse IP Lookup for Cybersecurity
Security analysts often use reverse IP lookup to uncover hidden connections between domains. If one malicious domain is found, checking other domains on the same IP can reveal additional threats or related infrastructure.
This makes reverse IP search an essential tool in threat intelligence, incident response, and digital forensics.
Limitations of Reverse IP Lookup
While powerful, reverse IP lookup may not always return complete results. This is because:
- Some domains use private or hidden DNS records
- CDNs may mask the origin server IP
- Data depends on publicly available DNS sources
Despite these limitations, this tool provides a fast and effective way to find domains on the same IP addressand gain insights into hosting relationships.
A reverse IP lookup finds domains hosted on the same IP address. Use it to investigate shared hosting, discover co-hosted malicious sites, or analyse infrastructure relationships between domains.
Results are based on public DNS and historical sources; they are useful but not guaranteed complete. CDNs, load balancers, and proxying can cause incomplete or misleading mappings.
Passive lookups of public DNS records are legal in most jurisdictions. Be careful with follow-up active scanning or probing — ensure you have permission before performing intrusive tests on systems you do not own.
Shared hosting providers and CDNs host many domains on the same IP. Conversely, dedicated hosting or newly provisioned servers may host only a single domain.
Export the domain list to cross-check with threat intelligence, blocklists, and certificate transparency logs. Investigate suspicious domains found on the same IP to identify additional malicious infrastructure.
CDNs and reverse proxies often mask origin IPs, so results may not include origin-hosted domains. The tool will show observable domains that resolve to the same public-facing IP.