IPv6 Subnet Calculator
Work out an IPv6 prefix: first and last address, size, /64 count, address type, reverse DNS zone, and how it splits into smaller subnets.
Enter an IPv6 prefix such as 2001:db8:abcd::/48 (or any address in it) to see where it starts and ends, how big it
is, what kind of address space it's in, its reverse DNS zone, and how it splits into smaller subnets. The usual plan: a site
gets a /48 (or a /56 for homes), and every network segment gets its own /64, the size SLAAC and most devices expect.
IPv4 prefixes work too.
/64 subnets
| Network | 2001:db8:abcd::/48 |
|---|---|
| Expanded | 2001:0db8:abcd:0000:0000:0000:0000:0000/48 |
| First address | 2001:db8:abcd:: |
| Last address | 2001:db8:abcd:ffff:ffff:ffff:ffff:ffff |
| Addresses | 2^80 (about 1.21E+24) |
| /64 networks | 65,536 |
| Type | Documentation (never routed) |
| Reverse DNS zone | d.c.b.a.8.b.d.0.1.0.0.2.ip6.arpa |
65,536 /64 subnets
| # | Subnet | Range |
|---|---|---|
| 1 | 2001:db8:abcd::/64 | 2001:db8:abcd:: – 2001:db8:abcd:0:ffff:ffff:ffff:ffff |
| 2 | 2001:db8:abcd:1::/64 | 2001:db8:abcd:1:: – 2001:db8:abcd:1:ffff:ffff:ffff:ffff |
| 3 | 2001:db8:abcd:2::/64 | 2001:db8:abcd:2:: – 2001:db8:abcd:2:ffff:ffff:ffff:ffff |
| 4 | 2001:db8:abcd:3::/64 | 2001:db8:abcd:3:: – 2001:db8:abcd:3:ffff:ffff:ffff:ffff |
| 5 | 2001:db8:abcd:4::/64 | 2001:db8:abcd:4:: – 2001:db8:abcd:4:ffff:ffff:ffff:ffff |
| 6 | 2001:db8:abcd:5::/64 | 2001:db8:abcd:5:: – 2001:db8:abcd:5:ffff:ffff:ffff:ffff |
| 7 | 2001:db8:abcd:6::/64 | 2001:db8:abcd:6:: – 2001:db8:abcd:6:ffff:ffff:ffff:ffff |
| 8 | 2001:db8:abcd:7::/64 | 2001:db8:abcd:7:: – 2001:db8:abcd:7:ffff:ffff:ffff:ffff |
| 9 | 2001:db8:abcd:8::/64 | 2001:db8:abcd:8:: – 2001:db8:abcd:8:ffff:ffff:ffff:ffff |
| 10 | 2001:db8:abcd:9::/64 | 2001:db8:abcd:9:: – 2001:db8:abcd:9:ffff:ffff:ffff:ffff |
| 11 | 2001:db8:abcd:a::/64 | 2001:db8:abcd:a:: – 2001:db8:abcd:a:ffff:ffff:ffff:ffff |
| 12 | 2001:db8:abcd:b::/64 | 2001:db8:abcd:b:: – 2001:db8:abcd:b:ffff:ffff:ffff:ffff |
| 13 | 2001:db8:abcd:c::/64 | 2001:db8:abcd:c:: – 2001:db8:abcd:c:ffff:ffff:ffff:ffff |
| 14 | 2001:db8:abcd:d::/64 | 2001:db8:abcd:d:: – 2001:db8:abcd:d:ffff:ffff:ffff:ffff |
| 15 | 2001:db8:abcd:e::/64 | 2001:db8:abcd:e:: – 2001:db8:abcd:e:ffff:ffff:ffff:ffff |
| 16 | 2001:db8:abcd:f::/64 | 2001:db8:abcd:f:: – 2001:db8:abcd:f:ffff:ffff:ffff:ffff |
| 17 | 2001:db8:abcd:10::/64 | 2001:db8:abcd:10:: – 2001:db8:abcd:10:ffff:ffff:ffff:ffff |
| 18 | 2001:db8:abcd:11::/64 | 2001:db8:abcd:11:: – 2001:db8:abcd:11:ffff:ffff:ffff:ffff |
| 19 | 2001:db8:abcd:12::/64 | 2001:db8:abcd:12:: – 2001:db8:abcd:12:ffff:ffff:ffff:ffff |
| 20 | 2001:db8:abcd:13::/64 | 2001:db8:abcd:13:: – 2001:db8:abcd:13:ffff:ffff:ffff:ffff |
| 21 | 2001:db8:abcd:14::/64 | 2001:db8:abcd:14:: – 2001:db8:abcd:14:ffff:ffff:ffff:ffff |
| 22 | 2001:db8:abcd:15::/64 | 2001:db8:abcd:15:: – 2001:db8:abcd:15:ffff:ffff:ffff:ffff |
| 23 | 2001:db8:abcd:16::/64 | 2001:db8:abcd:16:: – 2001:db8:abcd:16:ffff:ffff:ffff:ffff |
| 24 | 2001:db8:abcd:17::/64 | 2001:db8:abcd:17:: – 2001:db8:abcd:17:ffff:ffff:ffff:ffff |
| 25 | 2001:db8:abcd:18::/64 | 2001:db8:abcd:18:: – 2001:db8:abcd:18:ffff:ffff:ffff:ffff |
| 26 | 2001:db8:abcd:19::/64 | 2001:db8:abcd:19:: – 2001:db8:abcd:19:ffff:ffff:ffff:ffff |
| 27 | 2001:db8:abcd:1a::/64 | 2001:db8:abcd:1a:: – 2001:db8:abcd:1a:ffff:ffff:ffff:ffff |
| 28 | 2001:db8:abcd:1b::/64 | 2001:db8:abcd:1b:: – 2001:db8:abcd:1b:ffff:ffff:ffff:ffff |
| 29 | 2001:db8:abcd:1c::/64 | 2001:db8:abcd:1c:: – 2001:db8:abcd:1c:ffff:ffff:ffff:ffff |
| 30 | 2001:db8:abcd:1d::/64 | 2001:db8:abcd:1d:: – 2001:db8:abcd:1d:ffff:ffff:ffff:ffff |
| 31 | 2001:db8:abcd:1e::/64 | 2001:db8:abcd:1e:: – 2001:db8:abcd:1e:ffff:ffff:ffff:ffff |
| 32 | 2001:db8:abcd:1f::/64 | 2001:db8:abcd:1f:: – 2001:db8:abcd:1f:ffff:ffff:ffff:ffff |
| 33 | 2001:db8:abcd:20::/64 | 2001:db8:abcd:20:: – 2001:db8:abcd:20:ffff:ffff:ffff:ffff |
| 34 | 2001:db8:abcd:21::/64 | 2001:db8:abcd:21:: – 2001:db8:abcd:21:ffff:ffff:ffff:ffff |
| 35 | 2001:db8:abcd:22::/64 | 2001:db8:abcd:22:: – 2001:db8:abcd:22:ffff:ffff:ffff:ffff |
| 36 | 2001:db8:abcd:23::/64 | 2001:db8:abcd:23:: – 2001:db8:abcd:23:ffff:ffff:ffff:ffff |
| 37 | 2001:db8:abcd:24::/64 | 2001:db8:abcd:24:: – 2001:db8:abcd:24:ffff:ffff:ffff:ffff |
| 38 | 2001:db8:abcd:25::/64 | 2001:db8:abcd:25:: – 2001:db8:abcd:25:ffff:ffff:ffff:ffff |
| 39 | 2001:db8:abcd:26::/64 | 2001:db8:abcd:26:: – 2001:db8:abcd:26:ffff:ffff:ffff:ffff |
| 40 | 2001:db8:abcd:27::/64 | 2001:db8:abcd:27:: – 2001:db8:abcd:27:ffff:ffff:ffff:ffff |
| 41 | 2001:db8:abcd:28::/64 | 2001:db8:abcd:28:: – 2001:db8:abcd:28:ffff:ffff:ffff:ffff |
| 42 | 2001:db8:abcd:29::/64 | 2001:db8:abcd:29:: – 2001:db8:abcd:29:ffff:ffff:ffff:ffff |
| 43 | 2001:db8:abcd:2a::/64 | 2001:db8:abcd:2a:: – 2001:db8:abcd:2a:ffff:ffff:ffff:ffff |
| 44 | 2001:db8:abcd:2b::/64 | 2001:db8:abcd:2b:: – 2001:db8:abcd:2b:ffff:ffff:ffff:ffff |
| 45 | 2001:db8:abcd:2c::/64 | 2001:db8:abcd:2c:: – 2001:db8:abcd:2c:ffff:ffff:ffff:ffff |
| 46 | 2001:db8:abcd:2d::/64 | 2001:db8:abcd:2d:: – 2001:db8:abcd:2d:ffff:ffff:ffff:ffff |
| 47 | 2001:db8:abcd:2e::/64 | 2001:db8:abcd:2e:: – 2001:db8:abcd:2e:ffff:ffff:ffff:ffff |
| 48 | 2001:db8:abcd:2f::/64 | 2001:db8:abcd:2f:: – 2001:db8:abcd:2f:ffff:ffff:ffff:ffff |
| 49 | 2001:db8:abcd:30::/64 | 2001:db8:abcd:30:: – 2001:db8:abcd:30:ffff:ffff:ffff:ffff |
| 50 | 2001:db8:abcd:31::/64 | 2001:db8:abcd:31:: – 2001:db8:abcd:31:ffff:ffff:ffff:ffff |
| 51 | 2001:db8:abcd:32::/64 | 2001:db8:abcd:32:: – 2001:db8:abcd:32:ffff:ffff:ffff:ffff |
| 52 | 2001:db8:abcd:33::/64 | 2001:db8:abcd:33:: – 2001:db8:abcd:33:ffff:ffff:ffff:ffff |
| 53 | 2001:db8:abcd:34::/64 | 2001:db8:abcd:34:: – 2001:db8:abcd:34:ffff:ffff:ffff:ffff |
| 54 | 2001:db8:abcd:35::/64 | 2001:db8:abcd:35:: – 2001:db8:abcd:35:ffff:ffff:ffff:ffff |
| 55 | 2001:db8:abcd:36::/64 | 2001:db8:abcd:36:: – 2001:db8:abcd:36:ffff:ffff:ffff:ffff |
| 56 | 2001:db8:abcd:37::/64 | 2001:db8:abcd:37:: – 2001:db8:abcd:37:ffff:ffff:ffff:ffff |
| 57 | 2001:db8:abcd:38::/64 | 2001:db8:abcd:38:: – 2001:db8:abcd:38:ffff:ffff:ffff:ffff |
| 58 | 2001:db8:abcd:39::/64 | 2001:db8:abcd:39:: – 2001:db8:abcd:39:ffff:ffff:ffff:ffff |
| 59 | 2001:db8:abcd:3a::/64 | 2001:db8:abcd:3a:: – 2001:db8:abcd:3a:ffff:ffff:ffff:ffff |
| 60 | 2001:db8:abcd:3b::/64 | 2001:db8:abcd:3b:: – 2001:db8:abcd:3b:ffff:ffff:ffff:ffff |
| 61 | 2001:db8:abcd:3c::/64 | 2001:db8:abcd:3c:: – 2001:db8:abcd:3c:ffff:ffff:ffff:ffff |
| 62 | 2001:db8:abcd:3d::/64 | 2001:db8:abcd:3d:: – 2001:db8:abcd:3d:ffff:ffff:ffff:ffff |
| 63 | 2001:db8:abcd:3e::/64 | 2001:db8:abcd:3e:: – 2001:db8:abcd:3e:ffff:ffff:ffff:ffff |
| 64 | 2001:db8:abcd:3f::/64 | 2001:db8:abcd:3f:: – 2001:db8:abcd:3f:ffff:ffff:ffff:ffff |
The first 64 shown.