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IP Subnet & CIDR Calculator

Calculate IP network ID, broadcast address, netmask, and host counts from CIDR notation.

Netmask
255.255.255.0
Usable Hosts
254

How to Use IP Subnet & CIDR Calculator

  1. Enter or upload your input data into the designated tool area.
  2. Click the action button to process your data instantly.
  3. Review your result in the output preview section.
  4. Copy or download your processed file for free.

Frequently Asked Questions

What is CIDR notation?
CIDR (Classless Inter-Domain Routing) notation specifies the number of fixed network bits in an IP address (e.g., `/24`).