http://i3xi5qxvbrngh3g6o7czwjfxwjzigook7zxzjmgwg5b7xnjcn5hzciad.onion/proposals/323-walking-onions-full.html
Recall from proposal 300 that a SNIP is a set of information about
a single relay, plus proof from the directory authorities that the
given relay occupies a given range in a certain routing index.
For example, we can imagine that a SNIP might say: Relay X has the following IP, port, and onion key. In the routing index Y, it occupies index positions 0x20002
through 0x23000.