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/24 subnet mask
A /24 block has 256 addresses with the netmask 255.255.255.0. The most common subnet size, often used for a LAN or a single cloud subnet.
255.255.255.0| CIDR notation | /24 |
| Netmask | 255.255.255.0 |
| Wildcard mask | 0.0.0.255 |
| Total addresses | 256 |
| Usable hosts | 254 |
| Usable in an AWS subnet | 251 |
| Example range | 10.0.0.0/24: 10.0.0.0 to 10.0.0.255 |
How /24 fits with other sizes
- A /8 holds 65,536 subnets of /24.
- A /16 holds 256 subnets of /24.
- A /20 holds 16 subnets of /24.
- It splits into 2 subnets of /25.
- It splits into 4 subnets of /26.
- It splits into 16 subnets of /28.