I found that’s a quite interesting theme.
Could you or someone else give some use cases for these enounced applications?
I could imagine myself regarding the emails, but for the phone numbers by emails, sms, and much others, i’m not sure to know…
eventually like apps like whatsapp or X and so on ?..
that firefox service looks nice but is obviously not available (yet?) and will be charged as well.
For mobile numbers one has to register (least in Germany) therefore throwaway-numbers for personal use would be rather complicated.
Least for Germany satellite offers one free mobile-number (personally registered though) that works via app (mobile data or wifi) that one could use as a second number for usecases in which one wants to keep the option of being contacted but hide ones “real” number. Note that SMS is not available.
If the usecase is about not being contacted at all via the given phone number:
Not sure if there´s similar services in other countries but for Germany there´s the “Frank geht ran”-service (run by digitalcourage): a free-to-use burner phone number (it answers with a message from an answering machine in which a nice guy explains that the person that gave the number is absolutely not interested in being contacted via phone…)
edit: “Frank geht ran” for Austria