/7 Subnet
Subnet Mask
254.0.0.0
Wildcard Mask
1.255.255.255
Total IPs
33,554,432
Usable Hosts
33,554,430
Network Bits
7
Host Bits
25
About /7 Networks
Extremely large allocation, rarely used outside global routing. A /7 subnet uses the mask 254.0.0.0 and provides 33,554,430 usable host addresses out of 33,554,432 total IPs.
Example /7 Networks
| Network | Broadcast | First Host | Last Host |
|---|---|---|---|
| 10.0.0.0/7 | 11.255.255.255 | 10.0.0.1 | 11.255.255.254 |
| 172.0.0.0/7 | 173.255.255.255 | 172.0.0.1 | 173.255.255.254 |
| 192.0.0.0/7 | 193.255.255.255 | 192.0.0.1 | 193.255.255.254 |
| 192.0.0.0/7 | 193.255.255.255 | 192.0.0.1 | 193.255.255.254 |
| 8.0.0.0/7 | 9.255.255.255 | 8.0.0.1 | 9.255.255.254 |
Adjacent CIDRs
Frequently Asked Questions
What is a /7 subnet?
A /7 subnet uses the subnet mask 254.0.0.0 with 33,554,430 usable host addresses and 33,554,432 total IP addresses. It has 7 network bits and 25 host bits.
How many hosts in a /7 network?
A /7 network supports 33,554,430 usable hosts out of 33,554,432 total IP addresses. The usable range excludes the network address and broadcast address.
What subnet mask does /7 use?
A /7 subnet uses the mask 254.0.0.0 (wildcard mask 1.255.255.255). This means the first 7 bits identify the network and the remaining 25 bits identify hosts.