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CIDR / Subnet Calculator
CIDR / Subnet Calculator
Calculate network address, broadcast, usable IP range, and host counts for IPv4 CIDRs.
Open tool
Open CIDR Calculator →Inputs
- CIDR (e.g. 10.0.0.0/24)
This tool runs locally in your browser.
Output
- Network address
- Broadcast address
- First/last usable IP
- Total hosts / usable hosts