First, it needs to mentioned that between the three planets of Piaros, there is a shared web (as in internet web*). And since the web is shared by three worlds, the term "World Wide Web" wouldn't be exactly an accurate statement.
As a result, webpage addresses that originate from different planets goes like this: it's "iww" for planet Imest, "sww" for planet Stawdos, and "aww" (haha) for planet Anrakid. Or maybe, to lesser complicate things, they'd just use "pww" for the entire Piarosar system.
Of course, each individual planet's web would have existed before technology was advanced enough to have a web that could be shared between entire planets. So, older websites would be the ones to use either "iww," "sww," or "aww" depending on which planet the site's from.
Rarely, there would be the cases of some modern sites using "iww", "sww" and "aww", but that is mostly because the site is amateur (and likely under a free subscription, depending on whatever hosts the site).
* I don't know the terminology, I'm sorry