Reverse IP Lookup
Enter an IP address to discover domains currently hosted on that server and use the results to understand shared hosting, related infrastructure, or IP usage patterns more clearly.
Check what domains share an IP in seconds.
Helpful for infrastructure and security research.
Understand whether an IP looks heavily shared.
What this reverse IP lookup shows
This tool helps you inspect domains that appear to share the same IP address so you can better understand hosting relationships and infrastructure patterns.
That makes it useful for developers, researchers, security teams, hosting customers, and anyone investigating domain relationships or shared environments.
Why it matters
Shared IP usage can reveal hosting patterns, related domains, or neighboring sites that help add context during research.
What is a reverse IP lookup?
A reverse IP lookup queries a database to find all domains that point to a specific IP address. Unlike a forward DNS lookup (domain → IP), this goes IP → domains.
On shared hosting, hundreds of websites may share a single IP address. On dedicated servers or CDN edge nodes, the list is usually much smaller.
Use cases
- Research shared hosting neighbours before purchasing a hosting plan
- Investigate whether a suspicious IP is associated with known domains
- Verify that a domain's DNS has been updated to point to a new server
- Discover related infrastructure operated by the same organisation
Shared hosting vs. dedicated servers
On shared hosting, hundreds or even thousands of websites may share a single IP address. Each domain has its own folder on the server, but they all resolve to the same IP. On dedicated servers, one IP typically hosts only one or a few domains.
Reverse IP lookup reveals how many websites are on an IP, giving you insight into the hosting type and whether the IP is heavily shared.
Why reverse IP lookup matters
- Infrastructure assessment — understand whether websites are on shared or dedicated hosting.
- Competitor research — discover other sites run by the same organisation or hosting provider.
- Spam and abuse detection — identify suspicious or malicious domains on the same IP.
- Security audits — verify DNS changes have propagated and domains point to the correct servers.
- Hosting investigation — assess hosting quality by checking what other sites share your IP.
Understanding reverse DNS (rDNS)
Reverse DNS (rDNS) is different from reverse IP lookup. rDNS maps an IP address to a hostname (the opposite of forward DNS). A reverse IP lookup, on the other hand, finds all domains that resolve to an IP, not just the primary hostname.
This tool performs reverse IP lookup by querying a database of domains, not just DNS records. The results show all known domains hosted on that IP address.
Data freshness and accuracy
Reverse IP lookup results depend on the freshness of the underlying database. This tool queries a regularly updated database, but there may be a delay of hours or days before newly hosted domains appear in the results.
If a domain recently moved to an IP, it may not show up immediately. Conversely, if a domain was removed, it may still appear in results for a short time.
Frequently asked questions
Why do I see many domains on one IP?
That is common on shared hosting, CDN infrastructure, and other multi-tenant setups.
Can reverse IP lookup find subdomains?
Usually it focuses on known domains rather than every possible subdomain.
What if I don't see my domain?
The underlying data may not be fully up to date yet, or the domain may have moved recently.
Can this help with suspicious IP research?
Yes. It can help reveal neighboring domains and broader context around an IP address.