Calculate subnet details from any IPv4 address and CIDR prefix. Get the network, broadcast, usable hosts, wildcard mask and subnet mask instantly.
The prefix tells you how many bits are network vs host.
Network and broadcast addresses are never usable by hosts.
Leave headroom when dividing subnets for future devices.
Calculate subnet details from any IPv4 address and CIDR prefix. Get the network, broadcast, usable hosts, wildcard mask and subnet mask instantly.
Provide an IP and CIDR prefix.
Get network, broadcast, host range and masks.
| Prefix | Mask | Usable hosts |
|---|---|---|
| /24 | 255.255.255.0 | 254 |
| /16 | 255.255.0.0 | 65,534 |
| /8 | 255.0.0.0 | 16,777,214 |
It is completely free, private and requires no signup.
Use the tool nowIt separates the network portion of an IP from the host portion, e.g. 255.255.255.0 for /24.
It is the inverse of the subnet mask, used in access-control lists to match ranges.
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