PastelMar 10

Alright nerds, who can guess what this RegEx matches?

https://sopuli.xyz/post/42387212

Show threadOnno (VK6FLAB)Mar 10
At first glance IP address or URL, embedded in HTML, whatever it is, it’s a doozy. I wonder what the performance of it is like.
Show threadtowerful
It works out as O(regex^n)
Mar 10 at 11:46pmWeb