It has long been debated as to whether your website’s ip address affects your ranking in Google search results, particularly when sharing that ip address with potentially hundreds of other websites on a shared server. However, according to Craig Silverstein of Google, this is not a major contributing factor in their ranking algorithm so having a dedicated ip address for your site will not necessarily be of any benefit when it comes to SEO.
In an interview, Craig Silverstein of Google had this to say:
Actually, Google handles virtually hosted domains and their links just the same as domains on unique IP addresses. If your ISP does virtual hosting correctly, you’ll never see a difference between the two cases. We do see a small percentage of ISPs every month that misconfigure their virtual hosting, which might account for this persistent misperception.