Tools › Subnet cheat sheet › /20
/20 subnet: mask and number of hosts
A /20 network has a subnet mask of 255.255.240.0 and 4,096 total addresses (4,094 usable hosts).
| Property | Value |
|---|---|
| Prefix | /20 |
| Subnet mask | 255.255.240.0 |
| Wildcard mask | 0.0.15.255 |
| Total addresses | 4,096 |
| Usable hosts | 4,094 |
| Equivalent /24 networks | 16 |
When it is used
A medium network of about 4,000 addresses, common for cloud subnets.