CIDR Subnet Calculator

Compute network ranges, subnet masks, usable IP spans, and binary breakdowns for IPv4 subnets.

Netmask
255.255.255.0
Network Address
192.168.1.0
Broadcast Address
192.168.1.255
Usable Host Range
192.168.1.1 — 192.168.1.254
Usable Hosts
254
Total Addresses
256
Wildcard Mask
0.0.0.255
IP Classification
Private (RFC 1918)

About CIDR Subnet Calculator

Calculate subnet masks, network addresses, broadcast IPs, and usable host ranges from CIDR notation.

Key Features

  • 100% Client-Side execution for complete data privacy and security.
  • Instant processing with zero server round-trip latency.
  • Responsive layout optimized for both desktop and mobile viewports.