Free Networking Tools

Subnet & CIDR Calculator

Calculate IPv4 netmasks, usable host ranges, and network blocks visually with high fidelity.

Please enter a valid IP address.

IP Address

CIDR Mask

Adjust Subnet Mask /24

Subnet Mask 255.255.255.0

Total Host IPs 254

Network Address 192.168.1.0

Broadcast Address 192.168.1.255

Usable Host Range 192.168.1.1 - 192.168.1.254

Binary Boundary Visualization

IP Address: -

Netmask: -

Stop doing manual networking math

Calculating addresses and network sizes by hand is a relic of the past. LAN Lens automatically maps your network CIDR segment, sweeps active IP footprints, and isolates overlapping interfaces instantly on mobile.

Join the Private Beta