alright these are the official taxi numbers:
971 800 080 - san josé district. this includes playa d'en bossa, san jordi, airport, all the way from salinas through the whole south until cala bassa and I think even to port d'es torrent...then san an bay is san antonio number I think.
971 398 483 - ibiza town. includes figueretas.
971 333 333 - santa eularia. starts from jesus and talamanca onwards and goes up the east coast, I think including es canar.
I don't have the san antonio, san joan and san miguel numbers as I never really use them.