I need many class C IP's

[filat]

I still think aseohosting will be the best company for me.
Will try them and write more about them later on.

[JPC-Sabrina]

I have also heard that SEO isn't a proper justification for IPv4. Additionally, I have to second that using different class IP's wont' help you much with your rankings.

[jayfella]

You're forgetting that you will almost certainly get a block, meaning they will recur.

192.168.5.1
192.168.5.2
192.168.5.3
192.168.5.4

etc etc - so whatever you want to do is going to be easily overcome with a relatively simple SQL query or command.