Subnet Calculator

Calculate network addresses, broadcast, masks, usable hosts, and split subnets from any IP/CIDR.

🔒 Runs entirely in your browser

Input

IP Address CIDR Prefix Length

Network Details

Network Address-

Broadcast Address-

Subnet Mask-

Wildcard Mask-

First Usable Host-

Last Usable Host-

Usable Hosts-

Total Addresses-

IP Class-

Binary Visualisation - ■ Network bits ■ Host bits

Enter an IP address above

Subnet Splitter

Divide this network into equal smaller subnets.

New prefix length