/28 Subnet
Subnet Mask
255.255.255.240
Wildcard Mask
0.0.0.15
Total IPs
16
Usable Hosts
14
Network Bits
28
Host Bits
4
About /28 Networks
Small subnet — conference room or lab (14 hosts). A /28 subnet uses the mask 255.255.255.240 and provides 14 usable host addresses out of 16 total IPs.
Example /28 Networks
| Network | Broadcast | First Host | Last Host |
|---|---|---|---|
| 10.0.0.0/28 | 10.0.0.15 | 10.0.0.1 | 10.0.0.14 |
| 172.16.0.0/28 | 172.16.0.15 | 172.16.0.1 | 172.16.0.14 |
| 192.168.0.0/28 | 192.168.0.15 | 192.168.0.1 | 192.168.0.14 |
| 192.168.1.0/28 | 192.168.1.15 | 192.168.1.1 | 192.168.1.14 |
| 8.8.8.0/28 | 8.8.8.15 | 8.8.8.1 | 8.8.8.14 |
Adjacent CIDRs
Frequently Asked Questions
What is a /28 subnet?
A /28 subnet uses the subnet mask 255.255.255.240 with 14 usable host addresses and 16 total IP addresses. It has 28 network bits and 4 host bits.
How many hosts in a /28 network?
A /28 network supports 14 usable hosts out of 16 total IP addresses. The usable range excludes the network address and broadcast address.
What subnet mask does /28 use?
A /28 subnet uses the mask 255.255.255.240 (wildcard mask 0.0.0.15). This means the first 28 bits identify the network and the remaining 4 bits identify hosts.