Subnet Mask
/26 Subnet Mask
A /26 prefix means the subnet mask is 255.255.255.192. It has 6 host bits, giving 64 total addresses and 62 usable hosts.
/26 at a glance
| Property | Value |
|---|---|
| CIDR prefix | /26 |
| Subnet mask | 255.255.255.192 |
| Wildcard mask | 0.0.0.63 |
| Total addresses | 64 |
| Usable hosts | 62 |
| Host bits | 6 |
How it is calculated
A /26 sets the first 26 bits to 1 (network) and the remaining 6 bits to 0 (host). Usable hosts = 26 − 2 = 62.
The wildcard mask 0.0.0.63 is the inverse — used in Cisco ACLs and OSPF network statements.
Frequently asked questions
What is a /26 subnet mask?
A /26 equals 255.255.255.192 in dotted decimal (wildcard 0.0.0.63). It provides 64 total addresses and 62 usable hosts.
How many hosts are in a /26?
A /26 has 6 host bits, so it supports 62 usable hosts.
What is the wildcard mask for /26?
The wildcard (inverse) mask for /26 is 0.0.0.63, used in Cisco ACLs and OSPF statements.
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