/26 Subnet
62 usable hosts — quarter of a /24
A /26 divides a /24 into four equal segments, each with 64 addresses and 62 usable hosts. Frequently used in cloud environments where a small, isolated subnet is required per tier or function.
Common Use Cases
- → Cloud subnet per tier (web, app, db)
- → Small department or team VLAN
- → Security zone isolation
Example /26 Networks
| CIDR | Network | First Usable | Last Usable | Broadcast | Hosts |
|---|---|---|---|---|---|
| 10.0.0.0/26 | 10.0.0.0 | 10.0.0.1 | 10.0.0.62 | 10.0.0.63 | 62 |
| 172.16.0.0/26 | 172.16.0.0 | 172.16.0.1 | 172.16.0.62 | 172.16.0.63 | 62 |
| 172.31.0.0/26 | 172.31.0.0 | 172.31.0.1 | 172.31.0.62 | 172.31.0.63 | 62 |
| 192.168.0.0/26 | 192.168.0.0 | 192.168.0.1 | 192.168.0.62 | 192.168.0.63 | 62 |
| 192.168.1.0/26 | 192.168.1.0 | 192.168.1.1 | 192.168.1.62 | 192.168.1.63 | 62 |
| 10.0.1.0/26 | 10.0.1.0 | 10.0.1.1 | 10.0.1.62 | 10.0.1.63 | 62 |
How /26 Compares
| Prefix | Total IPs | Usable Hosts | Subnet Mask | Typical Use |
|---|---|---|---|---|
| /23 | 512 | 510 | 255.255.254.0 | Aggregated /24 pair |
| /24 | 256 | 254 | 255.255.255.0 | Standard subnet — home, office, cloud |
| /25 | 128 | 126 | 255.255.255.128 | Half a /24 — public/private split |
| /26 ◀ | 64 | 62 | 255.255.255.192 | Cloud per-tier subnet, small VLAN |
| /27 | 32 | 30 | 255.255.255.224 | Small workgroup / management subnet |
| /28 | 16 | 14 | 255.255.255.240 | AWS NAT/endpoint dedicated subnet |
| /29 | 8 | 6 | 255.255.255.248 | Tiny server cluster or infra segment |
Frequently Asked Questions
How many IPs are in a /26?
A /26 subnet contains 64 total IP addresses and 62 usable host addresses. The network address (first IP) and broadcast address (last IP) are reserved and cannot be assigned to hosts.
What is the subnet mask for /26?
The subnet mask for a /26 is 255.255.255.192.
In CIDR notation, the prefix length /26 means
the first 26 bits of the address are the network portion.
The wildcard (inverse) mask is 0.0.0.63.
How many /26 subnets fit in a /25?
Exactly 2 — a /25 can be split into two /26 subnets of equal size. Each /26 subnet has 62 usable hosts, compared to 126 in the parent /25.