free tool

Subnet calculator for IPv4 and IPv6

Enter an address with a prefix (CIDR) to get the network, mask, broadcast, usable host range and address type, and optionally split it into smaller subnets.

2001:db8:abcd::/48 IPv6

not public Documentation (RFC 3849)

Address: 2001:db8:abcd::
Expanded address: 2001:0db8:abcd:0000:0000:0000:0000:0000
Network: 2001:db8:abcd::/48
Prefix mask: ffff:ffff:ffff::
First address: 2001:db8:abcd::
Last address: 2001:db8:abcd:ffff:ffff:ffff:ffff:ffff
Total addresses: 2^80 (1.209e+24)
/64 subnets inside: 65,536
Reverse DNS zone: d.c.b.a.8.b.d.0.1.0.0.2.ip6.arpa

IPv6 has no broadcast address; every address in the prefix can be assigned (the all-zeros one is the subnet-router anycast address).

Split into /56 subnets

256 subnets.

Subnet	Range	Addresses
`2001:db8:abcd::/56`	`2001:db8:abcd:: - 2001:db8:abcd:ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:100::/56`	`2001:db8:abcd:100:: - 2001:db8:abcd:1ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:200::/56`	`2001:db8:abcd:200:: - 2001:db8:abcd:2ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:300::/56`	`2001:db8:abcd:300:: - 2001:db8:abcd:3ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:400::/56`	`2001:db8:abcd:400:: - 2001:db8:abcd:4ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:500::/56`	`2001:db8:abcd:500:: - 2001:db8:abcd:5ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:600::/56`	`2001:db8:abcd:600:: - 2001:db8:abcd:6ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:700::/56`	`2001:db8:abcd:700:: - 2001:db8:abcd:7ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:800::/56`	`2001:db8:abcd:800:: - 2001:db8:abcd:8ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:900::/56`	`2001:db8:abcd:900:: - 2001:db8:abcd:9ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a00::/56`	`2001:db8:abcd:a00:: - 2001:db8:abcd:aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b00::/56`	`2001:db8:abcd:b00:: - 2001:db8:abcd:bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c00::/56`	`2001:db8:abcd:c00:: - 2001:db8:abcd:cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d00::/56`	`2001:db8:abcd:d00:: - 2001:db8:abcd:dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e00::/56`	`2001:db8:abcd:e00:: - 2001:db8:abcd:eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f00::/56`	`2001:db8:abcd:f00:: - 2001:db8:abcd:fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1000::/56`	`2001:db8:abcd:1000:: - 2001:db8:abcd:10ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1100::/56`	`2001:db8:abcd:1100:: - 2001:db8:abcd:11ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1200::/56`	`2001:db8:abcd:1200:: - 2001:db8:abcd:12ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1300::/56`	`2001:db8:abcd:1300:: - 2001:db8:abcd:13ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1400::/56`	`2001:db8:abcd:1400:: - 2001:db8:abcd:14ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1500::/56`	`2001:db8:abcd:1500:: - 2001:db8:abcd:15ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1600::/56`	`2001:db8:abcd:1600:: - 2001:db8:abcd:16ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1700::/56`	`2001:db8:abcd:1700:: - 2001:db8:abcd:17ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1800::/56`	`2001:db8:abcd:1800:: - 2001:db8:abcd:18ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1900::/56`	`2001:db8:abcd:1900:: - 2001:db8:abcd:19ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1a00::/56`	`2001:db8:abcd:1a00:: - 2001:db8:abcd:1aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1b00::/56`	`2001:db8:abcd:1b00:: - 2001:db8:abcd:1bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1c00::/56`	`2001:db8:abcd:1c00:: - 2001:db8:abcd:1cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1d00::/56`	`2001:db8:abcd:1d00:: - 2001:db8:abcd:1dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1e00::/56`	`2001:db8:abcd:1e00:: - 2001:db8:abcd:1eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:1f00::/56`	`2001:db8:abcd:1f00:: - 2001:db8:abcd:1fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2000::/56`	`2001:db8:abcd:2000:: - 2001:db8:abcd:20ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2100::/56`	`2001:db8:abcd:2100:: - 2001:db8:abcd:21ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2200::/56`	`2001:db8:abcd:2200:: - 2001:db8:abcd:22ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2300::/56`	`2001:db8:abcd:2300:: - 2001:db8:abcd:23ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2400::/56`	`2001:db8:abcd:2400:: - 2001:db8:abcd:24ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2500::/56`	`2001:db8:abcd:2500:: - 2001:db8:abcd:25ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2600::/56`	`2001:db8:abcd:2600:: - 2001:db8:abcd:26ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2700::/56`	`2001:db8:abcd:2700:: - 2001:db8:abcd:27ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2800::/56`	`2001:db8:abcd:2800:: - 2001:db8:abcd:28ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2900::/56`	`2001:db8:abcd:2900:: - 2001:db8:abcd:29ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2a00::/56`	`2001:db8:abcd:2a00:: - 2001:db8:abcd:2aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2b00::/56`	`2001:db8:abcd:2b00:: - 2001:db8:abcd:2bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2c00::/56`	`2001:db8:abcd:2c00:: - 2001:db8:abcd:2cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2d00::/56`	`2001:db8:abcd:2d00:: - 2001:db8:abcd:2dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2e00::/56`	`2001:db8:abcd:2e00:: - 2001:db8:abcd:2eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:2f00::/56`	`2001:db8:abcd:2f00:: - 2001:db8:abcd:2fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3000::/56`	`2001:db8:abcd:3000:: - 2001:db8:abcd:30ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3100::/56`	`2001:db8:abcd:3100:: - 2001:db8:abcd:31ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3200::/56`	`2001:db8:abcd:3200:: - 2001:db8:abcd:32ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3300::/56`	`2001:db8:abcd:3300:: - 2001:db8:abcd:33ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3400::/56`	`2001:db8:abcd:3400:: - 2001:db8:abcd:34ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3500::/56`	`2001:db8:abcd:3500:: - 2001:db8:abcd:35ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3600::/56`	`2001:db8:abcd:3600:: - 2001:db8:abcd:36ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3700::/56`	`2001:db8:abcd:3700:: - 2001:db8:abcd:37ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3800::/56`	`2001:db8:abcd:3800:: - 2001:db8:abcd:38ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3900::/56`	`2001:db8:abcd:3900:: - 2001:db8:abcd:39ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3a00::/56`	`2001:db8:abcd:3a00:: - 2001:db8:abcd:3aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3b00::/56`	`2001:db8:abcd:3b00:: - 2001:db8:abcd:3bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3c00::/56`	`2001:db8:abcd:3c00:: - 2001:db8:abcd:3cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3d00::/56`	`2001:db8:abcd:3d00:: - 2001:db8:abcd:3dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3e00::/56`	`2001:db8:abcd:3e00:: - 2001:db8:abcd:3eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:3f00::/56`	`2001:db8:abcd:3f00:: - 2001:db8:abcd:3fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4000::/56`	`2001:db8:abcd:4000:: - 2001:db8:abcd:40ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4100::/56`	`2001:db8:abcd:4100:: - 2001:db8:abcd:41ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4200::/56`	`2001:db8:abcd:4200:: - 2001:db8:abcd:42ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4300::/56`	`2001:db8:abcd:4300:: - 2001:db8:abcd:43ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4400::/56`	`2001:db8:abcd:4400:: - 2001:db8:abcd:44ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4500::/56`	`2001:db8:abcd:4500:: - 2001:db8:abcd:45ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4600::/56`	`2001:db8:abcd:4600:: - 2001:db8:abcd:46ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4700::/56`	`2001:db8:abcd:4700:: - 2001:db8:abcd:47ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4800::/56`	`2001:db8:abcd:4800:: - 2001:db8:abcd:48ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4900::/56`	`2001:db8:abcd:4900:: - 2001:db8:abcd:49ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4a00::/56`	`2001:db8:abcd:4a00:: - 2001:db8:abcd:4aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4b00::/56`	`2001:db8:abcd:4b00:: - 2001:db8:abcd:4bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4c00::/56`	`2001:db8:abcd:4c00:: - 2001:db8:abcd:4cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4d00::/56`	`2001:db8:abcd:4d00:: - 2001:db8:abcd:4dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4e00::/56`	`2001:db8:abcd:4e00:: - 2001:db8:abcd:4eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:4f00::/56`	`2001:db8:abcd:4f00:: - 2001:db8:abcd:4fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5000::/56`	`2001:db8:abcd:5000:: - 2001:db8:abcd:50ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5100::/56`	`2001:db8:abcd:5100:: - 2001:db8:abcd:51ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5200::/56`	`2001:db8:abcd:5200:: - 2001:db8:abcd:52ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5300::/56`	`2001:db8:abcd:5300:: - 2001:db8:abcd:53ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5400::/56`	`2001:db8:abcd:5400:: - 2001:db8:abcd:54ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5500::/56`	`2001:db8:abcd:5500:: - 2001:db8:abcd:55ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5600::/56`	`2001:db8:abcd:5600:: - 2001:db8:abcd:56ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5700::/56`	`2001:db8:abcd:5700:: - 2001:db8:abcd:57ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5800::/56`	`2001:db8:abcd:5800:: - 2001:db8:abcd:58ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5900::/56`	`2001:db8:abcd:5900:: - 2001:db8:abcd:59ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5a00::/56`	`2001:db8:abcd:5a00:: - 2001:db8:abcd:5aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5b00::/56`	`2001:db8:abcd:5b00:: - 2001:db8:abcd:5bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5c00::/56`	`2001:db8:abcd:5c00:: - 2001:db8:abcd:5cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5d00::/56`	`2001:db8:abcd:5d00:: - 2001:db8:abcd:5dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5e00::/56`	`2001:db8:abcd:5e00:: - 2001:db8:abcd:5eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:5f00::/56`	`2001:db8:abcd:5f00:: - 2001:db8:abcd:5fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6000::/56`	`2001:db8:abcd:6000:: - 2001:db8:abcd:60ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6100::/56`	`2001:db8:abcd:6100:: - 2001:db8:abcd:61ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6200::/56`	`2001:db8:abcd:6200:: - 2001:db8:abcd:62ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6300::/56`	`2001:db8:abcd:6300:: - 2001:db8:abcd:63ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6400::/56`	`2001:db8:abcd:6400:: - 2001:db8:abcd:64ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6500::/56`	`2001:db8:abcd:6500:: - 2001:db8:abcd:65ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6600::/56`	`2001:db8:abcd:6600:: - 2001:db8:abcd:66ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6700::/56`	`2001:db8:abcd:6700:: - 2001:db8:abcd:67ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6800::/56`	`2001:db8:abcd:6800:: - 2001:db8:abcd:68ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6900::/56`	`2001:db8:abcd:6900:: - 2001:db8:abcd:69ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6a00::/56`	`2001:db8:abcd:6a00:: - 2001:db8:abcd:6aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6b00::/56`	`2001:db8:abcd:6b00:: - 2001:db8:abcd:6bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6c00::/56`	`2001:db8:abcd:6c00:: - 2001:db8:abcd:6cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6d00::/56`	`2001:db8:abcd:6d00:: - 2001:db8:abcd:6dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6e00::/56`	`2001:db8:abcd:6e00:: - 2001:db8:abcd:6eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:6f00::/56`	`2001:db8:abcd:6f00:: - 2001:db8:abcd:6fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7000::/56`	`2001:db8:abcd:7000:: - 2001:db8:abcd:70ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7100::/56`	`2001:db8:abcd:7100:: - 2001:db8:abcd:71ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7200::/56`	`2001:db8:abcd:7200:: - 2001:db8:abcd:72ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7300::/56`	`2001:db8:abcd:7300:: - 2001:db8:abcd:73ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7400::/56`	`2001:db8:abcd:7400:: - 2001:db8:abcd:74ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7500::/56`	`2001:db8:abcd:7500:: - 2001:db8:abcd:75ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7600::/56`	`2001:db8:abcd:7600:: - 2001:db8:abcd:76ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7700::/56`	`2001:db8:abcd:7700:: - 2001:db8:abcd:77ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7800::/56`	`2001:db8:abcd:7800:: - 2001:db8:abcd:78ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7900::/56`	`2001:db8:abcd:7900:: - 2001:db8:abcd:79ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7a00::/56`	`2001:db8:abcd:7a00:: - 2001:db8:abcd:7aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7b00::/56`	`2001:db8:abcd:7b00:: - 2001:db8:abcd:7bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7c00::/56`	`2001:db8:abcd:7c00:: - 2001:db8:abcd:7cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7d00::/56`	`2001:db8:abcd:7d00:: - 2001:db8:abcd:7dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7e00::/56`	`2001:db8:abcd:7e00:: - 2001:db8:abcd:7eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:7f00::/56`	`2001:db8:abcd:7f00:: - 2001:db8:abcd:7fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8000::/56`	`2001:db8:abcd:8000:: - 2001:db8:abcd:80ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8100::/56`	`2001:db8:abcd:8100:: - 2001:db8:abcd:81ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8200::/56`	`2001:db8:abcd:8200:: - 2001:db8:abcd:82ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8300::/56`	`2001:db8:abcd:8300:: - 2001:db8:abcd:83ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8400::/56`	`2001:db8:abcd:8400:: - 2001:db8:abcd:84ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8500::/56`	`2001:db8:abcd:8500:: - 2001:db8:abcd:85ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8600::/56`	`2001:db8:abcd:8600:: - 2001:db8:abcd:86ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8700::/56`	`2001:db8:abcd:8700:: - 2001:db8:abcd:87ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8800::/56`	`2001:db8:abcd:8800:: - 2001:db8:abcd:88ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8900::/56`	`2001:db8:abcd:8900:: - 2001:db8:abcd:89ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8a00::/56`	`2001:db8:abcd:8a00:: - 2001:db8:abcd:8aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8b00::/56`	`2001:db8:abcd:8b00:: - 2001:db8:abcd:8bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8c00::/56`	`2001:db8:abcd:8c00:: - 2001:db8:abcd:8cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8d00::/56`	`2001:db8:abcd:8d00:: - 2001:db8:abcd:8dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8e00::/56`	`2001:db8:abcd:8e00:: - 2001:db8:abcd:8eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:8f00::/56`	`2001:db8:abcd:8f00:: - 2001:db8:abcd:8fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9000::/56`	`2001:db8:abcd:9000:: - 2001:db8:abcd:90ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9100::/56`	`2001:db8:abcd:9100:: - 2001:db8:abcd:91ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9200::/56`	`2001:db8:abcd:9200:: - 2001:db8:abcd:92ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9300::/56`	`2001:db8:abcd:9300:: - 2001:db8:abcd:93ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9400::/56`	`2001:db8:abcd:9400:: - 2001:db8:abcd:94ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9500::/56`	`2001:db8:abcd:9500:: - 2001:db8:abcd:95ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9600::/56`	`2001:db8:abcd:9600:: - 2001:db8:abcd:96ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9700::/56`	`2001:db8:abcd:9700:: - 2001:db8:abcd:97ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9800::/56`	`2001:db8:abcd:9800:: - 2001:db8:abcd:98ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9900::/56`	`2001:db8:abcd:9900:: - 2001:db8:abcd:99ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9a00::/56`	`2001:db8:abcd:9a00:: - 2001:db8:abcd:9aff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9b00::/56`	`2001:db8:abcd:9b00:: - 2001:db8:abcd:9bff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9c00::/56`	`2001:db8:abcd:9c00:: - 2001:db8:abcd:9cff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9d00::/56`	`2001:db8:abcd:9d00:: - 2001:db8:abcd:9dff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9e00::/56`	`2001:db8:abcd:9e00:: - 2001:db8:abcd:9eff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:9f00::/56`	`2001:db8:abcd:9f00:: - 2001:db8:abcd:9fff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a000::/56`	`2001:db8:abcd:a000:: - 2001:db8:abcd:a0ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a100::/56`	`2001:db8:abcd:a100:: - 2001:db8:abcd:a1ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a200::/56`	`2001:db8:abcd:a200:: - 2001:db8:abcd:a2ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a300::/56`	`2001:db8:abcd:a300:: - 2001:db8:abcd:a3ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a400::/56`	`2001:db8:abcd:a400:: - 2001:db8:abcd:a4ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a500::/56`	`2001:db8:abcd:a500:: - 2001:db8:abcd:a5ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a600::/56`	`2001:db8:abcd:a600:: - 2001:db8:abcd:a6ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a700::/56`	`2001:db8:abcd:a700:: - 2001:db8:abcd:a7ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a800::/56`	`2001:db8:abcd:a800:: - 2001:db8:abcd:a8ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:a900::/56`	`2001:db8:abcd:a900:: - 2001:db8:abcd:a9ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:aa00::/56`	`2001:db8:abcd:aa00:: - 2001:db8:abcd:aaff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ab00::/56`	`2001:db8:abcd:ab00:: - 2001:db8:abcd:abff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ac00::/56`	`2001:db8:abcd:ac00:: - 2001:db8:abcd:acff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ad00::/56`	`2001:db8:abcd:ad00:: - 2001:db8:abcd:adff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ae00::/56`	`2001:db8:abcd:ae00:: - 2001:db8:abcd:aeff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:af00::/56`	`2001:db8:abcd:af00:: - 2001:db8:abcd:afff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b000::/56`	`2001:db8:abcd:b000:: - 2001:db8:abcd:b0ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b100::/56`	`2001:db8:abcd:b100:: - 2001:db8:abcd:b1ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b200::/56`	`2001:db8:abcd:b200:: - 2001:db8:abcd:b2ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b300::/56`	`2001:db8:abcd:b300:: - 2001:db8:abcd:b3ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b400::/56`	`2001:db8:abcd:b400:: - 2001:db8:abcd:b4ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b500::/56`	`2001:db8:abcd:b500:: - 2001:db8:abcd:b5ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b600::/56`	`2001:db8:abcd:b600:: - 2001:db8:abcd:b6ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b700::/56`	`2001:db8:abcd:b700:: - 2001:db8:abcd:b7ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b800::/56`	`2001:db8:abcd:b800:: - 2001:db8:abcd:b8ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:b900::/56`	`2001:db8:abcd:b900:: - 2001:db8:abcd:b9ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ba00::/56`	`2001:db8:abcd:ba00:: - 2001:db8:abcd:baff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:bb00::/56`	`2001:db8:abcd:bb00:: - 2001:db8:abcd:bbff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:bc00::/56`	`2001:db8:abcd:bc00:: - 2001:db8:abcd:bcff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:bd00::/56`	`2001:db8:abcd:bd00:: - 2001:db8:abcd:bdff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:be00::/56`	`2001:db8:abcd:be00:: - 2001:db8:abcd:beff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:bf00::/56`	`2001:db8:abcd:bf00:: - 2001:db8:abcd:bfff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c000::/56`	`2001:db8:abcd:c000:: - 2001:db8:abcd:c0ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c100::/56`	`2001:db8:abcd:c100:: - 2001:db8:abcd:c1ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c200::/56`	`2001:db8:abcd:c200:: - 2001:db8:abcd:c2ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c300::/56`	`2001:db8:abcd:c300:: - 2001:db8:abcd:c3ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c400::/56`	`2001:db8:abcd:c400:: - 2001:db8:abcd:c4ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c500::/56`	`2001:db8:abcd:c500:: - 2001:db8:abcd:c5ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c600::/56`	`2001:db8:abcd:c600:: - 2001:db8:abcd:c6ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c700::/56`	`2001:db8:abcd:c700:: - 2001:db8:abcd:c7ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c800::/56`	`2001:db8:abcd:c800:: - 2001:db8:abcd:c8ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:c900::/56`	`2001:db8:abcd:c900:: - 2001:db8:abcd:c9ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ca00::/56`	`2001:db8:abcd:ca00:: - 2001:db8:abcd:caff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:cb00::/56`	`2001:db8:abcd:cb00:: - 2001:db8:abcd:cbff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:cc00::/56`	`2001:db8:abcd:cc00:: - 2001:db8:abcd:ccff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:cd00::/56`	`2001:db8:abcd:cd00:: - 2001:db8:abcd:cdff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ce00::/56`	`2001:db8:abcd:ce00:: - 2001:db8:abcd:ceff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:cf00::/56`	`2001:db8:abcd:cf00:: - 2001:db8:abcd:cfff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d000::/56`	`2001:db8:abcd:d000:: - 2001:db8:abcd:d0ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d100::/56`	`2001:db8:abcd:d100:: - 2001:db8:abcd:d1ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d200::/56`	`2001:db8:abcd:d200:: - 2001:db8:abcd:d2ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d300::/56`	`2001:db8:abcd:d300:: - 2001:db8:abcd:d3ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d400::/56`	`2001:db8:abcd:d400:: - 2001:db8:abcd:d4ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d500::/56`	`2001:db8:abcd:d500:: - 2001:db8:abcd:d5ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d600::/56`	`2001:db8:abcd:d600:: - 2001:db8:abcd:d6ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d700::/56`	`2001:db8:abcd:d700:: - 2001:db8:abcd:d7ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d800::/56`	`2001:db8:abcd:d800:: - 2001:db8:abcd:d8ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:d900::/56`	`2001:db8:abcd:d900:: - 2001:db8:abcd:d9ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:da00::/56`	`2001:db8:abcd:da00:: - 2001:db8:abcd:daff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:db00::/56`	`2001:db8:abcd:db00:: - 2001:db8:abcd:dbff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:dc00::/56`	`2001:db8:abcd:dc00:: - 2001:db8:abcd:dcff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:dd00::/56`	`2001:db8:abcd:dd00:: - 2001:db8:abcd:ddff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:de00::/56`	`2001:db8:abcd:de00:: - 2001:db8:abcd:deff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:df00::/56`	`2001:db8:abcd:df00:: - 2001:db8:abcd:dfff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e000::/56`	`2001:db8:abcd:e000:: - 2001:db8:abcd:e0ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e100::/56`	`2001:db8:abcd:e100:: - 2001:db8:abcd:e1ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e200::/56`	`2001:db8:abcd:e200:: - 2001:db8:abcd:e2ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e300::/56`	`2001:db8:abcd:e300:: - 2001:db8:abcd:e3ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e400::/56`	`2001:db8:abcd:e400:: - 2001:db8:abcd:e4ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e500::/56`	`2001:db8:abcd:e500:: - 2001:db8:abcd:e5ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e600::/56`	`2001:db8:abcd:e600:: - 2001:db8:abcd:e6ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e700::/56`	`2001:db8:abcd:e700:: - 2001:db8:abcd:e7ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e800::/56`	`2001:db8:abcd:e800:: - 2001:db8:abcd:e8ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:e900::/56`	`2001:db8:abcd:e900:: - 2001:db8:abcd:e9ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ea00::/56`	`2001:db8:abcd:ea00:: - 2001:db8:abcd:eaff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:eb00::/56`	`2001:db8:abcd:eb00:: - 2001:db8:abcd:ebff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ec00::/56`	`2001:db8:abcd:ec00:: - 2001:db8:abcd:ecff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ed00::/56`	`2001:db8:abcd:ed00:: - 2001:db8:abcd:edff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ee00::/56`	`2001:db8:abcd:ee00:: - 2001:db8:abcd:eeff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ef00::/56`	`2001:db8:abcd:ef00:: - 2001:db8:abcd:efff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f000::/56`	`2001:db8:abcd:f000:: - 2001:db8:abcd:f0ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f100::/56`	`2001:db8:abcd:f100:: - 2001:db8:abcd:f1ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f200::/56`	`2001:db8:abcd:f200:: - 2001:db8:abcd:f2ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f300::/56`	`2001:db8:abcd:f300:: - 2001:db8:abcd:f3ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f400::/56`	`2001:db8:abcd:f400:: - 2001:db8:abcd:f4ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f500::/56`	`2001:db8:abcd:f500:: - 2001:db8:abcd:f5ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f600::/56`	`2001:db8:abcd:f600:: - 2001:db8:abcd:f6ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f700::/56`	`2001:db8:abcd:f700:: - 2001:db8:abcd:f7ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f800::/56`	`2001:db8:abcd:f800:: - 2001:db8:abcd:f8ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:f900::/56`	`2001:db8:abcd:f900:: - 2001:db8:abcd:f9ff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:fa00::/56`	`2001:db8:abcd:fa00:: - 2001:db8:abcd:faff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:fb00::/56`	`2001:db8:abcd:fb00:: - 2001:db8:abcd:fbff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:fc00::/56`	`2001:db8:abcd:fc00:: - 2001:db8:abcd:fcff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:fd00::/56`	`2001:db8:abcd:fd00:: - 2001:db8:abcd:fdff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:fe00::/56`	`2001:db8:abcd:fe00:: - 2001:db8:abcd:feff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)
`2001:db8:abcd:ff00::/56`	`2001:db8:abcd:ff00:: - 2001:db8:abcd:ffff:ffff:ffff:ffff:ffff`	2^72 (4.722e+21)

How to read the result

Network is the first address of the block with the prefix length: the name of the subnet, used in routing tables and firewall rules.
Netmask is the prefix written as an address (/24 = 255.255.255.0). Wildcard mask is its inverse, used by Cisco ACLs and OSPF.
Broadcast is the last address; packets sent there reach every host on the subnet. IPv6 has no broadcast.
First and last usable host bound the addresses you can assign. Gateways usually take the first or last one by convention.
Usable hosts is total addresses minus the network and broadcast addresses (2^32-prefix - 2 for IPv4).
The type line says whether the address is public, private (RFC 1918), carrier-grade NAT, loopback, link-local, documentation or another special range.

IPv4 CIDR cheat sheet

Prefix	Netmask	Addresses	Usable hosts
/8	255.0.0.0	16,777,216	16,777,214
/16	255.255.0.0	65,536	65,534
/20	255.255.240.0	4,096	4,094
/22	255.255.252.0	1,024	1,022
/23	255.255.254.0	512	510
/24	255.255.255.0	256	254
/25	255.255.255.128	128	126
/26	255.255.255.192	64	62
/27	255.255.255.224	32	30
/28	255.255.255.240	16	14
/29	255.255.255.248	8	6
/30	255.255.255.252	4	2
/31	255.255.255.254	2	2 (point-to-point)
/32	255.255.255.255	1	1 (single host)

Common mistakes

Using a host address as the network. 192.168.1.77/24 is a host in 192.168.1.0/24. Route and firewall entries need the network address; the calculator shows it.
Forgetting the two reserved addresses. A /29 gives 6 hosts, not 8. Size subnets for hosts plus gateway plus growth.
Overlapping subnets. 10.0.0.0/16 already contains 10.0.5.0/24. Splitting a block with the split option gives non-overlapping pieces.
Picking 192.168.0.0/24 or 192.168.1.0/24 for a VPN. Home routers use them, so remote users collide. Pick something less common in 10.0.0.0/8 or 172.16.0.0/12.
Subnetting IPv6 smaller than /64 for a LAN. SLAAC needs a /64; use /127 only for point-to-point links.

FAQ

Why are there two fewer usable hosts than addresses?

In an IPv4 subnet the first address is the network address and the last is the broadcast address, so a /24 has 256 addresses but 254 usable hosts. /31 (point-to-point links, RFC 3021) and /32 (a single host) are the exceptions.

What is a wildcard mask?

The inverse of the netmask: 0 bits must match, 1 bits can be anything. 255.255.255.0 becomes 0.0.0.255. Cisco ACLs and OSPF network statements use wildcard masks.

Which IP ranges are private?

IPv4 private ranges (RFC 1918) are 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16. 100.64.0.0/10 is carrier-grade NAT space, and 169.254.0.0/16 is link-local. In IPv6 the private equivalent is fc00::/7 (unique local addresses).

Can I enter a netmask instead of a prefix?

Yes: 192.168.1.10 255.255.255.0 and 192.168.1.10/255.255.255.0 both work and are converted to /24. A bare address is treated as a single host (/32 or /128).

Why is my IPv6 subnet a /64?

IPv6 LANs use /64 because SLAAC address autoconfiguration needs a 64-bit interface ID. Sites usually get a /48 or /56 and carve /64s out of it; use the split option to list them.