I’m looking for a service, that replicates the functionality of email aliases, but with phone numbers.
I’d imagine having one number (99999) which I then could use with suffixes like 99999-1, 99999-2, … etc for services like WhatsApp, telegram, 2FA, etc… if such thing even exists.
I really want a good service for disposable phone numbers. In many countries phone numbers are legally required to be linked to real identities. Its the worse attack on privacy. Still not happy signal requires it and refuses to federate.
It depends a LOT on where you are. In the USA, Canada, and (I think) Mexico, such a thing is not possible, at least in any way that the services you mentioned will care.
It might be possible in places where phone numbers don’t have a fixed length, like (again, I think) Germany.
Not exactly what you’re looking for, but mysudo may work for what you want to do.
Not possible