Sample results: https://ipinfo.io/summarize-ips/result?id=239e90aa-88b8-4476-84c7-bfd10ed2de3f
You can paste any arbitrary text into the tool at https://ipinfo.io/summarize-ips and we'll extract the IPs.
It can be useful for getting a quick summary of a set of IPs (eg. click on first google result for "public proxies", copy and paste the results into the tool, and see where the proxies are located, and the networks they're on), for investigating issues (eg. your website gets a large spike of traffic, paste the recent IPs from your access log into the tool and see if there's a specific network that stands out), threat investigation, debugging and more.
We're planning to add more functionality and data points in the near future, and any feedback or suggestions are very welcome!