IPv6 Subnet Calculator
Enter an IPv6 address with a prefix to see its network, address range, number of /64 subnets, and its full and short forms. You can also split the prefix into smaller subnets.
unique local (ULA)fd00:1234::86:0/112
networkfd00:1234::86:0/112
first hostfd00:1234::86:0
last hostfd00:1234::86:ffff
addresses2¹⁶ = 65,536
short formfd00:1234::86:0
ipcalc fd00:1234::86:0/112
addressfd00:1234:0000:0000:0000:0000:0086:0000
networkfd00:1234:0000:0000:0000:0000:0086:0000
last hostfd00:1234:0000:0000:0000:0000:0086:ffff
green = network digits, amber = digit split by the prefix
full formfd00:1234:0000:0000:0000:0000:0086:0000
reverse dns0.0.0.0.6.8.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.3.2.1.0.0.d.f.ip6.arpa
/112 split into /127 · 32,768 subnets
close ×showing 256 of 32,768
01 / table
IPv6 prefix table.
Click a prefix longer than your network to split it into subnets.
| prefix | addresses | /64 subnets | in your /112 |
|---|---|---|---|
| /8 | 2¹²⁰ | 2⁵⁶ | - |
| /12 | 2¹¹⁶ | 2⁵² | - |
| /16 | 2¹¹² | 2⁴⁸ | - |
| /20 | 2¹⁰⁸ | 2⁴⁴ | - |
| /24 | 2¹⁰⁴ | 2⁴⁰ | - |
| /28 | 2¹⁰⁰ | 2³⁶ | - |
| /32 | 2⁹⁶ | 4,294,967,296 | - |
| /36 | 2⁹² | 268,435,456 | - |
| /40 | 2⁸⁸ | 16,777,216 | - |
| /44 | 2⁸⁴ | 1,048,576 | - |
| /48 | 2⁸⁰ | 65,536 | - |
| /52 | 2⁷⁶ | 4,096 | - |
| /56 | 2⁷² | 256 | - |
| /60 | 2⁶⁸ | 16 | - |
| /64 | 2⁶⁴ | 1 | - |
| /72 | 2⁵⁶ | - | - |
| /80 | 2⁴⁸ | - | - |
| /96 | 4,294,967,296 | - | - |
| /112 | 65,536 | - | 1 |
| /120 | 256 | - | 256 split → |
| /124 | 16 | - | 4,096 split → |
| /126 | 4 | - | 16,384 split → |
| /127 | 2 | - | 32,768 split → |
| /128 | 1 | - | 65,536 split → |
02 / faq
About this calculator.
How do I use this IPv6 calculator?
▼
Type an IPv6 address followed by a prefix, like 2001:db8:abcd::1/48. Without a prefix it uses /64. The address can be written in full or shortened with ::.
Why does IPv6 have no broadcast address?
▼
IPv6 replaced broadcast with multicast, so no address is set aside for it. That is why this calculator shows the whole range, from the network address to the last address.
What prefix do ISPs usually hand out?
▼
A single LAN is almost always a /64. Home customers usually get a /56 or /60, and an organization or site usually gets a /48. One /48 holds 65,536 /64 subnets.