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.
It’s also an attack on legitimate services that get inundated with spam/bots/abuse/etc. and one of many reasons why they’re not a widespread thing to begin with.
There are a good number of resources for what you want but I don’t want to name names because they should stay hard to find on purpose IMO.
There’s also many other e2ee chat apps that don’t require a phone number such as SimpleX, Briar, Tox, Session etc.