Subnet Calculator
Calculate IPv4 network, broadcast, host range and masks from CIDR notation.
How it works
- 1Type an address like 192.168.1.10/24.
- 2Read the network details.
Features
- CIDR or dotted mask input.
- Network, broadcast, first and last host, host count.
- Handles /31 and /32.
- Private: runs in your browser; nothing is uploaded.
Frequently asked questions
Why are 2 addresses missing from the host count?
The network and broadcast addresses can't be given to devices, except in /31 and /32.
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