/20 subnet
A /20 prefix equals subnet mask 255.255.240.0 and wildcard 0.0.15.255. It holds 4,096 addresses, 4,094 of them usable by hosts.
/20
- Subnet mask
- 255.255.240.0
- Wildcard mask
- 0.0.15.255
- Binary mask
- 11111111.11111111.11110000.00000000
- Total addresses
- 4,096
- Usable hosts
- 4,094
- Example network
- 10.0.0.0/20
- Example range
- 10.0.0.0 – 10.0.15.255
- How many fit
- 4,096 × /20 in a /8, 16 × /20 in a /16