Board Thread:Questions and Answers/@comment-43477399-20190812092320/@comment-27659575-20190812111304

As far as I know, the range of a Stand is how far it can go from its User, so for instance Star Platinum cannot go further than 2m away from Jotaro.

Since users always seem to summon their Stands near them, it can be inferred that it's universal although that's speculation.