CIDR / Subnet Calculator
Compute network, broadcast, mask and host range for an IPv4 CIDR block.
How it works
Enter an IPv4 CIDR block (e.g. 10.0.0.0/24) to get network, broadcast, mask, wildcard, and usable host range. Essential for VPC planning and firewall rules.
Example: 192.168.1.0/26 yields 64 addresses, range .1–.62.
Network address
10.0.0.0Broadcast address
10.0.0.255Subnet mask
255.255.255.0Wildcard mask
0.0.0.255First host
10.0.0.1Last host
10.0.0.254Total addresses
256Usable hosts
254