More numbers than you can shake a stick at. Just to give you an idea, at the ISP level (/32) that’s 79 septillion IP addresses assigned. That number is so big I had to go look it up on Wikipedia to find out what it’s called. Every home user will have 18 quntillion addresses at his disposal – I don’t have 18 quntillion pieces of lint in my house, let alone a desire to connect every single one to the internet!