IPv6
/96
4,294,967,296
IPv6 /96 prefix
/96 means the first 96 bits are the network and 32 are left for hosts. That is 4,294,967,296 addresses.
Addresses are 128 bits, so nobody writes a mask — only the prefix length. A home gets a /56, a single network a /64.
- Prefix
- /96
- Host bits
- 32
- Addresses
- 4,294,967,296
- Usable hosts
- 4,294,967,296
- /64 networks inside
- None
- Nibble boundary
- Yes
Blocks reserved at this length
Blocks the standards set aside. The addresses themselves are the same everywhere, so they are left as they are.
::ffff:0:0/9664:ff9b::/96
Prefixes either side
How to read this
- /24 means the first 24 bits are the network; the remaining 8 hold the addresses inside it.
- Each extra bit splits the network in two and halves the addresses.
- Usable addresses are normally the total minus two — the network and broadcast addresses.
- IPv6 has no broadcast, so nothing is subtracted. One network is conventionally a /64.
Frequently asked questions
Q. How many addresses are in a /96?
4,294,967,296, of which 4,294,967,296 can actually be handed out.
Q. How is a /96 written?
IPv6 uses no mask — you simply write /96.
Q. How many /64 networks fit in a /96?
None — it is narrower than a /64.
Q. How many host bits are there?
32. Each extra network bit halves the addresses.