Feature summary (what you would like to be able to do and where):
I can already use Special:Contributions to check all edits made by some IP range (e.g. 8.8.0.0/16). But if I want to check the list of deleted edits, I can do it only for single IP adresses. This is infeasible when fighting some LTAs that come from ranges. Special:DeletedContributions/8.8.0.0/16 would return nothing, regardless of whether there were any deleted edits from that range.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
Admin who wants to make a range-block may want to ensure how many false-positives may be affected. Thus, he or she could want to check the amount of deleted edits from the range to be blocked. They are at the moment unable to do so.

Benefits (why should this be implemented?):
When fighting a vandal that comes from a variable IP (i.e. their edits come from IP range and not single address), it's possible to list the contributions made from a given IP range (eg. 8.8.0.0/16). However, if a vandal tries to evade our control, they may do good-faith edits and create ill pages. This gives admins an impression that the range cannot be blocked straightforward because of significant number of good edits while being unable to check how many deleted edits were done from that range.