/26 Subnet: Mask 255.255.255.192, 62 Usable Hosts
A /26 subnet has a subnet mask of 255.255.255.192 and contains 64 total IP addresses, of which 62 are usable host addresses (the network and broadcast addresses are reserved). 4 /26 networks fit inside a single /24.
| CIDR notation | /26 |
|---|---|
| Subnet mask | 255.255.255.192 |
| Wildcard mask | 0.0.0.63 |
| Mask in binary | 11111111.11111111.11111111.11000000 |
| Total addresses | 64 (2^6) |
| Usable hosts | 62 |
| Host bits | 6 |
Usable hosts in a /26 by platform
Cloud providers reserve more than the usual two addresses per subnet, so the same /26 gives you fewer usable IPs in the cloud than on a standard LAN.
| Platform | Reserved IPs | Usable hosts |
|---|---|---|
| Standard (network + broadcast) | 2 | 62 |
| AWS VPC | 5 | 59 |
| Microsoft Azure VNet | 5 | 59 |
| Google Cloud VPC | 4 | 60 |
| Oracle Cloud VCN | 3 | 61 |
Good to know
A /26 (62 usable hosts) splits a /24 into four. A popular size for a single office floor, a VLAN, or a rack of servers.
How a /26 is calculated
- The /26 means the first 26 bits are the network portion, leaving 6 host bits.
- Total addresses = 2^(32 - 26) = 2^6 = 64.
- Usable hosts (standard) = 64 - 2 (network + broadcast) = 62.
- Subnet mask = 255.255.255.192; wildcard mask = 0.0.0.63.
Want to split a /26 into smaller subnets, see every address range, or plan a VLSM layout? Open the free subnet calculator →