Skip to main content

Subnet Mask Calculator

Calculate network subnets, IP ranges, and CIDR notation for network engineering.
Local-first

Network address

192.168.1.0

Broadcast address

192.168.1.255

Usable host range

192.168.1.1 - .254

Total usable hosts

254

How this tool works

What it accepts, how to use it, and where your input is processed.

Subnetting is the practice of dividing a network into two or more networks. It improves routing efficiency, enhances security, and helps manage the limited number of IP addresses.

Common CIDR Values:

  • /24: 256 IPs (Standard Office)
  • /32: 1 IP (Single Host)
  • /16: 65,536 IPs (Large Enterprise)
  • /8: 16.7M IPs (Class A)
Need an extra feature or found an edge case?Send Feedback

Related tools

Open after you finish the primary task.

Show
Browse all utilities
Base64 Encoder / Decoder
Developer

Encode and decode text to and from Base64 format securely.

Open tool
My IP Address Info
Developer

View your current public IP address and detected network information instantly.

Open tool
QR Code Reader
Developer

Upload an image of a QR code to decode and view its underlying URL or text data.

Open tool