What Can Someone Do with My IP Address? Should I Be Worried? Alternatively: What Can Someone Do with M

Wow, thanks everyone! Didn’t expect so many replies.

I reset my router like some of you said, and my IP changed (checked with whatsmyip.com). Also downloaded ProtonVPN just in case.

One follow-up: If they already had my old IP, can they still do anything with it after it’s changed? Or is it useless now?

(Also, big relief knowing they can’t actually hack me lol.)