255.255.255.192 Subnet Mask
255.255.255.192 is the subnet mask for a /26 network — 62 usable hosts out of 64 addresses.
CIDR Prefix
/26
Wildcard Mask
0.0.0.63
Total Addresses
64
Usable Hosts
62
Network Bits
26
Host Bits
6
255.255.255.192 in Binary
Each octet is eight bits. The highlighted bits are the 26 network bits; the rest are the 6 host bits that vary within the subnet.
255
255
255
192
Networks Using 255.255.255.192
| Network | Host Range | Broadcast |
|---|---|---|
| 10.0.0.0/26 | 10.0.0.1 – 10.0.0.62 | 10.0.0.63 |
| 172.16.0.0/26 | 172.16.0.1 – 172.16.0.62 | 172.16.0.63 |
| 192.168.1.0/26 | 192.168.1.1 – 192.168.1.62 | 192.168.1.63 |
Neighbouring Masks
Frequently Asked Questions
What CIDR prefix is 255.255.255.192?
255.255.255.192 is /26 in CIDR notation. The mask sets the first 26 of the 32 bits in an IPv4 address to 1, marking them as the network portion, and leaves the remaining 6 bits as 0 for hosts.
How many hosts does 255.255.255.192 allow?
A network with mask 255.255.255.192 holds 64 addresses, of which 62 are usable by hosts — the network address and the broadcast address are reserved.
What is the wildcard mask for 255.255.255.192?
The wildcard mask for 255.255.255.192 is 0.0.0.63. It is the bitwise inverse: every 1 in the subnet mask becomes a 0 and every 0 becomes a 1. Cisco access lists and OSPF network statements take the wildcard form rather than the subnet mask.
Standards
- RFC 950 — Internet Standard Subnetting Procedure
Defines the dotted-decimal subnet mask itself, and the rule that the network and broadcast addresses are not assignable to hosts.
- RFC 4632 — Classless Inter-Domain Routing (CIDR)
Establishes the /26 prefix notation that 255.255.255.192 is equivalent to, and requires masks to be contiguous — which is why exactly 33 of the 4.3 billion possible values are valid.