Since the implementation of T163562 it is possible to fetch the contributions from an IP range. However, the list seems to be incomplete.
Take for example https://fa.wikipedia.org/wiki/Special:Contributions/197.38.249.28/16?uselang=en
Currently it shows only four edits by two distinct IP addresses (=197.38.159.33 and 197.38.249.28) but this is incomplete; edits by 197.38.242.55 are not displayed, for instance. In fact if you enable the Contributions Range gadget on that wiki, you will find 7 distinct IP addresses in that range that have made contributions in the past. Screenshot below.