If you are using a shared webhosting services, there are pretty high chances that your hosting provider may be allowing several other sites to be hosted on the same server, not that hosting multiple sites on a single server is a problem, but having more than a specified number of websites hosted on a single server, can definitely cause a lot of problems with server performances and website load times.
If you are looking to sign up with a hosting provider, it is pretty essential that you check how many websites are hosted on a single IP address. This indeed is quite a task, since the hosting provider will not tell you the exact number, and there is not easy way to find that out.
Related: Find Out Who Is Hosting A Website
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