Feature summary (what you would like to be able to do and where): Add a link to the /16, /24, /32, etc common CIDR notation subnets from [[Special:IPContributions]], for example:

(this is done on enwiki with a script User:Daniel_Quinlan/Scripts/RangeHelper.js but I feel like having them in core won't be a bad idea)

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):

• Admins/TAIV wanting to see disruption across a specific range
• Following TA/IP hopping LTAs

Benefits (why should this be implemented?):

• Admins/patrollers being able to make judgments on which range to block

Acceptance criteria

• Add a link to the /16, /24 and /32 CIDR notation subnets to the top of Special:IPContributions]