/27 Subnet
Subnet Mask
255.255.255.224
Wildcard Mask
0.0.0.31
Total IPs
32
Usable Hosts
30
Network Bits
27
Host Bits
5
About /27 Networks
Small subnet — team or workgroup (30 hosts). A /27 subnet uses the mask 255.255.255.224 and provides 30 usable host addresses out of 32 total IPs.
Example /27 Networks
| Network | Broadcast | First Host | Last Host |
|---|---|---|---|
| 10.0.0.0/27 | 10.0.0.31 | 10.0.0.1 | 10.0.0.30 |
| 172.16.0.0/27 | 172.16.0.31 | 172.16.0.1 | 172.16.0.30 |
| 192.168.0.0/27 | 192.168.0.31 | 192.168.0.1 | 192.168.0.30 |
| 192.168.1.0/27 | 192.168.1.31 | 192.168.1.1 | 192.168.1.30 |
| 8.8.8.0/27 | 8.8.8.31 | 8.8.8.1 | 8.8.8.30 |
Adjacent CIDRs
Frequently Asked Questions
What is a /27 subnet?
A /27 subnet uses the subnet mask 255.255.255.224 with 30 usable host addresses and 32 total IP addresses. It has 27 network bits and 5 host bits.
How many hosts in a /27 network?
A /27 network supports 30 usable hosts out of 32 total IP addresses. The usable range excludes the network address and broadcast address.
What subnet mask does /27 use?
A /27 subnet uses the mask 255.255.255.224 (wildcard mask 0.0.0.31). This means the first 27 bits identify the network and the remaining 5 bits identify hosts.