This time around though it seems there's a certain obvious difficulty in certain commenters to contextualize what's being shown here.
I understand that "oh but that could be an app/website/whatever" or that "it's an US phone number, I ain't gonna use that" or "ahhhh, this is gonna be abused soooo bad" and so on and so forth... but folks: this clearly is meant to be something quirky and - I think - a v1.
Have we perhaps become a bit of a boring grumpy bunch around here? My 2c.