I heard it recently that maybe DNS should be used like the phone book of the future. Why not have nicholasrjohnson.com dial me up and have a TXT record or some kind of new DNS record that contains my phone number?
This may be a security or privacy issue, but it may be something to look into. Then, all your ID information would be in one place. Maybe it could even be more than just phone numbers? I am just not sure if I would want that kind of information on the internet. However, with DNS over HTTPS, this may solve some issues. And, maybe there could be some sort of permissions?
This is just a quick thought that I was pondering. Maybe someone else could look into expanding it. Comment if you dare.