Subnet Calculator
IPv4 ranges, masks and host counts as you type.
Runs entirely in your browser. Nothing you enter is sent anywhere.
Takes an IPv4 address and prefix (or CIDR like 10.0.0.0/8) and works out the network, broadcast, host range, masks, host counts and address type.
You can also paste CIDR notation, like 10.0.0.0/8.
Try
Network
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ClickTap any value to copy it.
In binary network bits bold, host bits light
- Address
- Mask