[aembleton]

For anyone else wondering how many IP addresses /48 gives you in IPv6 land, it's 65,536!

This page helps with the CIDR notation for IPv6: http://www.mediawiki.org/wiki/Help:Range_blocks/IPv6

[justincormack]

No it gives you 65536 /64 blocks. Far more IPs than that! You can give every machine a /64, but I only do if they are running containers or VMs.