Reverse IP Lookup
Find domains sharing an IP address — who else lives on that server.
How to use Reverse IP Lookup
- Enter an IP or domain — domains resolve to their IP first.
- Review the co-hosted domains — the server's known tenants.
- Interpret by hosting type: thousands of strangers = shared hosting; a tight cluster = likely one operator.
- Treat matches as leads — corroborate association with WHOIS, content and tracking-ID overlaps.
What is Reverse IP Lookup?
A reverse IP lookup inverts normal DNS: instead of asking where a domain points, it asks which domains point at an IP — revealing the websites sharing a server. On shared hosting, that's dozens to thousands of neighbors; on dedicated infrastructure, a handful of related properties.
Co-hosting is circumstantial evidence with real uses: mapping a network of related sites (same operator, same server is a common pattern), assessing shared-hosting neighborhoods, and security research connecting infrastructure dots.
About the Reverse IP Lookup
Enter an IP (or a domain — it resolves first) and see domains known to be hosted on it.
The investigative uses: related-site discovery — spam networks, fake-review clusters and scam families often co-host; one bad site's IP can enumerate its siblings (evidence, not proof — shared hosting co-locates strangers constantly); SEO forensics — PBN (private blog network) detection classically starts with shared IPs; neighborhood checks — seeing hundreds of low-grade sites beside yours on shared hosting is informative, though the old "bad neighborhood hurts SEO" fear is largely obsolete (Google understands shared hosting); and infrastructure mapping — how an organization's properties cluster.
Reading limits honestly: results depend on discovery databases (never perfectly complete or current), CDN IPs return the CDN's vast tenant crowd (meaningless for attribution), and co-hosting alone proves association only weakly — it's a lead generator for further checks (WHOIS, content, analytics IDs), not a verdict.