User blog comment:KnazO/What is a Range Block and how do I use them?/@comment-27345308-20170819210356

Hmm, you could've expressed the decimal numbers as binary to explain them. For example,, converted to binary would be. Now, if we apply a range block of /19 around that IP, it would block everybody from  (first 19 digits are the same, others are 0) to   (first 19 digits are same, others are 1), which, converted to decimal, are   and , and the range block would look like. If you get what I mean.