Got some clicks on my ads from a histing company ips

HI i am running a PPC campaign . i was recording ips that were clicking on my ads . i found two ips 198-71-86-57 and 162-220-13-71 which i traced back to hosting providers like quadranet . so i want to know how this is happening ? is there real people or competitors doing fraud with my campaign ads ? i know that there is lots of competition around in my vertical .

is there a proxy running behind these ips ? Any suggestion on how this is possible ?