/4 Subnet
Subnet Mask
240.0.0.0
Wildcard Mask
15.255.255.255
Total IPs
268,435,456
Usable Hosts
268,435,454
Network Bits
4
Host Bits
28
About /4 Networks
Extremely large allocation, rarely used outside global routing. A /4 subnet uses the mask 240.0.0.0 and provides 268,435,454 usable host addresses out of 268,435,456 total IPs.
Example /4 Networks
| Network | Broadcast | First Host | Last Host |
|---|---|---|---|
| 0.0.0.0/4 | 15.255.255.255 | 0.0.0.1 | 15.255.255.254 |
| 160.0.0.0/4 | 175.255.255.255 | 160.0.0.1 | 175.255.255.254 |
| 192.0.0.0/4 | 207.255.255.255 | 192.0.0.1 | 207.255.255.254 |
| 192.0.0.0/4 | 207.255.255.255 | 192.0.0.1 | 207.255.255.254 |
| 0.0.0.0/4 | 15.255.255.255 | 0.0.0.1 | 15.255.255.254 |
Adjacent CIDRs
Frequently Asked Questions
What is a /4 subnet?
A /4 subnet uses the subnet mask 240.0.0.0 with 268,435,454 usable host addresses and 268,435,456 total IP addresses. It has 4 network bits and 28 host bits.
How many hosts in a /4 network?
A /4 network supports 268,435,454 usable hosts out of 268,435,456 total IP addresses. The usable range excludes the network address and broadcast address.
What subnet mask does /4 use?
A /4 subnet uses the mask 240.0.0.0 (wildcard mask 15.255.255.255). This means the first 4 bits identify the network and the remaining 28 bits identify hosts.