just a note, if you are gun ho on different class c's then you need to use different hosts since the whois information is also evaluated when considering a ban or flags for black hat methods. Some hosts simply resell for other hosts and mark up the price, so if you can't keep track of 6 bills pay more. But if you want to save money and have more control over what hosts are worth keeping then sing up for 6 separate hosts. You don't even need dedicated i.p.'s that way.
Good luck
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