User blog comment:Henry Hudson GC/Question regarding autoblocks/@comment-34888194-20200104032534

Nope. Autoblocks last for 24 hours, regardless of how long you've blocked the user for. The IP address that has been "autoblocked" won't have a blocked mark in their profile, though it is affected since the last user had used that same ip. The user that you blocked will have the BLOCKED tag on their masthead.