The calculator handles /31 point-to-point and /32 single-address cases explicitly. It is a planning aid, not a network discovery service.
ToolStable
IPv4 Subnet Calculator
Calculate network, broadcast, mask, and usable IPv4 ranges locally from an address and CIDR prefix.
- Published
Workbench
Runs in your browserno requests
JavaScript is required to run this local tool. Your input is not submitted anywhere.
Accepts
- IPv4 address
- CIDR prefix
Returns
- network
- broadcast
- mask
- usable range
- host counts
Filed under
Evidence register
1The calculator uses tested unsigned 32-bit IPv4 arithmetic in the local implementation.
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