A few people have asked, what does SEO have to do with hosting?
We’ve known for several years now that Google has a patent which filters and devalues inter-IP links.
Quoting Google’s patent:
Re-ranking component 122 begins by identifying the documents in the initial set that have a hyperlink to document x. (Act 301). The set of documents that have such hyperlinks are denoted as B(y). Documents from the same host as document x tend to be similar to document x but often do not provide significant new information to the user. Accordingly, re-ranking component 124 removes documents from B(y) that have the same host as document x. (Act 302). More specifically, let IP3(x) denote the first three octets of the IP (Internet Protocol) address of document x (i.e., the IP subnet). If IP3(x)=IP3(y), document y is removed from B(y).
On occasion, multiple different hosts may be similar enough to one another to be considered the same host for purposes of Acts 301 and 302. For example, one host may be a “mirror” site for a different primary host and thus contain the same documents as the primary host. Additionally, a host site may be affiliated with another site, and thus contain the same or nearly the same documents. Similar or affiliated hosts may be determined through a manual search or by an automated web search that compares the contents at different hosts. Documents from such similar or affiliated hosts may be removed by re-ranking component 124 from B(y) in Act 302.
But if you’re not linking to your own sites from your own sites, why worry about inter-IP link devaluation? You don’t need to. But why are you not linking to your own sites? If you have the link popularity, use it.
We here at v7n own a hundred or so sites, and for the most part they do not participate in inter-linking schemes. Why? Because they are on different topics. Health, finance, travel, etc. Inter-linking those sites would not create much in the way of link popularity, but we still host them each on different IP ranges. The reason for this is, in one word, Google.
Google loves to launch half baked filters and penalties. They do this on the basis of what they know, so it’s in our interest to keep Google’s knowledge to a minimum. At least where it concerns website ownership.
That’s where multiple Class C IP web hosting comes in. It’s the SEO equivalent of not keeping all your eggs in one basket.
It might also be a good idea to keep your domain registration private.