IPv6 Subnetting Calculator

Input an IPv6 address and the subnet size in slash notation:
IPv6 address:
Compressed Address: 2607:f1c0:832:ef00::80/56
Expanded Address: 2607:f1c0:0832:ef00:0000:0000:0000:0080/56
Prefix: ffff:ffff:ffff:ff00:0000:0000:0000:0000
Range: 2607:f1c0:832:ef00:0:0:0:0
2607:f1c0:832:efff:ffff:ffff:ffff:ffff
Number of /64s: 256

Select a number of subnets or a subnet size to divide the above into:
subnets or

Subnetting 2607:f1c0:832:ef00::80/56 into /64s gives 256 subnets, all of which have 1 /64s.

2607:f1c0:832:ef00::/64
....
2607:f1c0:832:efff::/64

Use the above calculator to plan your IPv6 networks. Because of the huge size of IPv6, we do not care about the number of hosts in a network. Remember, that the smallest recommended subnet is a /64.