IPv6 /112 Subnet
Sometimes used for point-to-point links and container networks, though /64 or /127 are more common choices. Enter any address below to see its /112 block.
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Examples:
IPv6 network
65,536 addresses
Documentation
Details
First Address
Last Address
Total Addresses
Expanded
Address Entered
Split Into Subnets
2001:db8:abcd:12::/1132001:db8:abcd:12:: – 2001:db8:abcd:12::7fff
2001:db8:abcd:12::8000/1132001:db8:abcd:12::8000 – 2001:db8:abcd:12::ffff
Subnet Calculator
IPv6 /112 at a glance
Prefix/112
Total Addresses65,536
Host Bits16
Hex Digits Fixed28
An IPv6 /112 fixes the first 112 of 128 bits. That is exactly 28 hex digits, so the boundary falls cleanly between digits, which makes addresses easy to read.
IPv6 has no broadcast address, so every address in the block can be used, but networks with hosts on them should be /64 so SLAAC and neighbour discovery work as designed.
Questions
How many /64s are in a /112?
None: a /112 is smaller than a /64.
How many addresses are in an IPv6 /112?
65,536.
What size IPv6 block should a hosting provider give each VM?
A /64 per VM is the cleanest: the customer can use any addresses inside it, and abuse handling and reverse DNS work per /64. A single /128 also works but some software expects a /64.
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