Use this tool to see if all of a site's links are coming from the same server or server farm.
If they are, the links may be from other sites controlled by the same company.
Visually inspecting those domains can help you determine if the most popular sites on that IP are spammy and thus potentially dangerous neighbours to have for valid sites hosted on the same IP or even subnet. Our database is updated regularly and contains hundreds of millions of resolved domain names - give it a go!
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