Reverse IP Lookup — other domains on the same server
Resolve a domain to its IP, then find other domains hosted on the same address. Useful for spotting shared hosting and site networks.
How to read the result
- IP
- The IPv4 address the domain resolves to — the address the lookup is performed against.
- Neighbours
- Other domain names that have been observed answering at the same address. A long list normally means shared hosting; a short one or none means a dedicated address, or simply that the dataset has not seen the others.
- What a long list means
- Shared hosting, almost always. Hundreds or thousands of sites on one address is how budget hosting works and is not by itself a problem.
- What a short list means
- Either a dedicated address, or simply that the passive-DNS dataset has not catalogued the others. The two look identical from here.
Where this tool is wrong
Every check here reads one signal, and each has a blind spot worth knowing before you act on the answer.
- This is the single most misread tool on the site. If the domain sits behind a CDN, the address belongs to the CDN and the "neighbours" are thousands of unrelated strangers who happen to use the same provider. That result tells you nothing whatsoever about who you share a server with.
- Reverse-IP data comes from a passive-DNS dataset, which is incomplete by nature. An empty result means nothing was observed, not that nothing is there.
- The list is capped, and what is shown is a sample rather than a census.
Common questions
Does sharing an IP address with other sites hurt my SEO?
Not in itself. Shared hosting is how most of the web works and search engines know it. The case where a neighbour matters is a small, low-quality address range full of spam — and that is a hosting quality problem, not an SEO penalty mechanic.
Why do I see thousands of domains I have never heard of?
Almost certainly because the address is a CDN edge rather than your server. Check whether a CDN is detected on the domain first; if one is, this list is about the CDN.
The tool found no neighbours. Do I have a dedicated server?
Maybe, but this cannot prove it. Passive-DNS coverage is patchy and a quiet address simply may not have been catalogued. Your hosting plan is the reliable answer.
Can I find every site someone owns with this?
No, and it is worth being clear about why: the tool shows domains observed at one address. Someone with sites spread across several hosts, or behind a CDN, will not be grouped together by this at all.