Network Tool100% Client-side

Subnet, CIDR & VLSM Calculator

Calculate network, broadcast, usable host ranges and bin-pack optimal VLSM allocations locally in your browser.

IP & Mask Parameters

IPv4 Address

CIDR Prefix: /24255.255.255.0

/0/8/16/24/30/32

Common Subnets

All bitwise arithmetic runs purely in your browser. Zero network telemetry transmitted.

Subnet Analysis Result

Class CRFC1918 Private IP

Network Address

192.168.1.0

Broadcast Address

192.168.1.255

Subnet Mask

255.255.255.0

Wildcard Mask

0.0.0.255

First Usable Host

192.168.1.1

Last Usable Host

192.168.1.254

Usable Hosts

254 (256 total)

CIDR Notation

192.168.1.100/24

Binary Representation

IP:11000000.10101000.00000001.01100100

Mask:11111111.11111111.11111111.00000000

Network:11000000.10101000.00000001.00000000

Broadcast:11000000.10101000.00000001.11111111