/0 Subnet
Subnet Mask
0.0.0.0
Wildcard Mask
255.255.255.255
Total IPs
4,294,967,296
Usable Hosts
4,294,967,294
Network Bits
0
Host Bits
32
About /0 Networks
Default route — matches all IPv4 addresses. A /0 subnet uses the mask 0.0.0.0 and provides 4,294,967,294 usable host addresses out of 4,294,967,296 total IPs.
Example /0 Networks
Adjacent CIDRs
Frequently Asked Questions
What is a /0 subnet?
A /0 subnet uses the subnet mask 0.0.0.0 with 4,294,967,294 usable host addresses and 4,294,967,296 total IP addresses. It has 0 network bits and 32 host bits.
How many hosts in a /0 network?
A /0 network supports 4,294,967,294 usable hosts out of 4,294,967,296 total IP addresses. The usable range excludes the network address and broadcast address.
What subnet mask does /0 use?
A /0 subnet uses the mask 0.0.0.0 (wildcard mask 255.255.255.255). This means the first 0 bits identify the network and the remaining 32 bits identify hosts.