/3 Subnet
Subnet Mask
224.0.0.0
Wildcard Mask
31.255.255.255
Total IPs
536,870,912
Usable Hosts
536,870,910
Network Bits
3
Host Bits
29
About /3 Networks
Extremely large allocation, rarely used outside global routing. A /3 subnet uses the mask 224.0.0.0 and provides 536,870,910 usable host addresses out of 536,870,912 total IPs.
Example /3 Networks
| Network | Broadcast | First Host | Last Host |
|---|---|---|---|
| 0.0.0.0/3 | 31.255.255.255 | 0.0.0.1 | 31.255.255.254 |
| 160.0.0.0/3 | 191.255.255.255 | 160.0.0.1 | 191.255.255.254 |
| 192.0.0.0/3 | 223.255.255.255 | 192.0.0.1 | 223.255.255.254 |
| 192.0.0.0/3 | 223.255.255.255 | 192.0.0.1 | 223.255.255.254 |
| 0.0.0.0/3 | 31.255.255.255 | 0.0.0.1 | 31.255.255.254 |
Adjacent CIDRs
Frequently Asked Questions
What is a /3 subnet?
A /3 subnet uses the subnet mask 224.0.0.0 with 536,870,910 usable host addresses and 536,870,912 total IP addresses. It has 3 network bits and 29 host bits.
How many hosts in a /3 network?
A /3 network supports 536,870,910 usable hosts out of 536,870,912 total IP addresses. The usable range excludes the network address and broadcast address.
What subnet mask does /3 use?
A /3 subnet uses the mask 224.0.0.0 (wildcard mask 31.255.255.255). This means the first 3 bits identify the network and the remaining 29 bits identify hosts.