User blog comment:Masterire/VOTING: Should we block Unregistered Users from Editing?/@comment-4660173-20150107032851

I quote Wikipedia- "Administrators can block ranges of IP addresses (commonly called  rangeblocking). Use careful judgement and make them as brief as possible; they can affect up to 65,536 IPv4 addresses or 649,037,107,316,853,453,566,312,041,152,512 (~6.49*10 32 ) IPv6 addresses each, potentially affecting millions of users. These should be reserved as an absolute last resort, especially very large rangeblocks."