The below table shows IPv6 prefixes (/32 and greater), including the number of bits used for the network portion and the number of IP addresses.
[table id=24 /]
Example
The most common IPv6 address is a /64 address. An IPv6 address has 128 bits, so a /64 prefix splits the IP address right down the middle. The first 64 bits are used for the network, and the last 64 bits are used for hosts.
Network | Nodes -------------------+------------------- 2001:0DB8:85A3:08D3:1319:8A2E:0370:7348/64
The smaller the prefix, the more nodes are available. For instance, a /56 address leave 72 bits for nodes:
Network | Nodes -----------------+--------------------- 2001:0DB8:85A3:08D3:1319:8A2E:0370:7348/56