Run a reverse IP lookup to see every domain that resolves to a given IP address. Useful for spotting shared-hosting neighbours, mapping a hosting account, hunting for related sites, or qualifying server quality before you migrate.
Our reverse IP lookup data is gathered from a vast network of global probes, with a particular emphasis on data centers and DNS records prevalent across the United States.
Forward DNS answers 'which address does this name point to'. Reverse IP lookup asks the harder question in the other direction: which names point at this address?
A single domain, or a handful belonging to the same owner, indicates a dedicated address — good for deliverability and isolation. Dozens or hundreds of unrelated domains mean shared hosting, where your neighbours' behaviour can affect your reputation. Zero results usually means the address belongs to a CDN or proxy: those edges front so many domains that meaningful attribution is impossible, and the origin behind them is not exposed.
| Sites on IP | Likely hosting type | Implication |
|---|---|---|
| 1 | Dedicated IP / VPS / Cloud | Clean SEO neighbourhood |
| 2–50 | Small shared plan | Usually fine for SMB sites |
| 50–500 | Cheap shared hosting | Watch for noisy neighbours |
| 500+ | Overloaded shared / parking | Consider migrating |
An SEO agency wants to understand where a competitor hosts their various projects. By performing a reverse IP lookup on the competitor's main domain, they can uncover other websites managed by the same entity on the same server, revealing their digital footprint and infrastructure choices.
A small business owner notices their site performance is erratic. Using a shared hosting lookup, they discover their IP is shared with several blacklisted spam sites. This prompts them to contact their host to request an IP change or consider a dedicated server.
A security researcher wants to identify all public-facing assets associated with a specific organization. A reverse IP lookup on one of their known IPs reveals a list of development and staging sites on the same server, highlighting potential overlooked entry points.
A hosting provider wants to understand the types of websites that frequently co-locate on specific data center IPs. They use reverse IP lookup to analyze multiple IPs, gathering data on common niches and hosting requirements to tailor their service offerings.
A reverse IP lookup identifies all domain names hosted on an IP. Reverse DNS (rDNS) is a specific query for a PTR record, which maps an IP address back to its associated canonical hostname, primarily used for mail server validation and trust. While related, they serve distinct purposes.
Yes — free, unlimited, no signup.
Our shared hosting lookup queries global DNS records and databases to find all domain names associated with a given IP address. It essentially performs an inverse search, revealing which websites are configured to resolve to that specific IP, thereby exposing other sites on same server instances.
Finding sites on the same server is crucial for SEO, security, and competitive analysis. It helps identify 'bad neighbors' that could harm your site's reputation, reveals potential security vulnerabilities on shared infrastructure, and offers insights into competitor strategies or hosting provider usage patterns.
A reverse IP lookup itself shows associated domains. To find the true owner, you would typically use a WHOIS lookup tool for each discovered domain. This combination provides a powerful way to link multiple domains to specific registrants or organizations, enhancing your investigative capabilities.
The accuracy of reverse IP lookup data depends on the completeness of public DNS records and the sophistication of the lookup tool. Our tool leverages extensive global data sources for high accuracy, but dynamic hosting changes and CDN usage can sometimes present challenges, which we continuously work to mitigate with fresh data.
Modern Google does not penalise shared IPs by default, but spammy neighbours can drag down a server's overall reputation for email and security signals.
When a site sits behind Cloudflare its real origin IP is hidden. Reverse lookup on the Cloudflare edge IP returns Cloudflare-owned hostnames only.
Reverse IP lookup turns a single IP address into a map of everything hosted beside it — ideal for shared-hosting audits, competitor research, spotting PBN footprints and diagnosing email reputation problems. Combine it with the IP checker to confirm ownership and the host checker to name the provider.