Networking tools
CIDR / Subnet Calculator
Calculate IPv4 network ranges, masks, host counts, and subnet splits.
Network Summary
Run the calculator to see network details.
Binary View
Network bits will appear here.
Subnet Splits
| Subnet | Network | Usable Range | Broadcast | Addresses |
|---|---|---|---|---|
| Choose a larger split prefix and calculate. | ||||
Plan IPv4 ranges without doing subnet math by hand
The CIDR and subnet calculator turns an IPv4 network into its network address, broadcast address, usable host range, subnet mask, wildcard mask, and host counts. It helps when you are planning firewall rules, VPN ranges, route tables, or allowlists.
Use subnet splitting to compare smaller ranges before committing cloud network, router, or access-control changes.