/9 subnet
A /9 prefix equals subnet mask 255.128.0.0 and wildcard 0.127.255.255. It holds 8,388,608 addresses, 8,388,606 of them usable by hosts.
/9
- Subnet mask
- 255.128.0.0
- Wildcard mask
- 0.127.255.255
- Binary mask
- 11111111.10000000.00000000.00000000
- Total addresses
- 8,388,608
- Usable hosts
- 8,388,606
- Example network
- 10.0.0.0/9
- Example range
- 10.0.0.0 – 10.127.255.255
- How many fit
- 2 × /9 in a /8