Doubt you’re going to find the popup a number came from, unless someone has posted about it on a forum before. These sites aren’t indexed and are difficult to track.
@R34P3R#6261 Ok. I will find another site.
That isn’t what he is saying @HumorousCharles#6263, the likelihood of you finding the web address is very low and you most likely won’t find it on any other scammer site either.