OnlineToolYardFAST & PRIVATE

Subnet & CIDR IP Calculator

Calculate subnet mask, network address, broadcast address, and usable IP range.

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How to Use

  1. Type an IPv4 address and CIDR block (e.g. `10.0.0.0/16`) into the input box.
  2. The tool instantly calculates the Subnet Mask, Network Address, and Broadcast Address.
  3. It also provides the exact usable host range and the total number of usable hosts.
  4. Bookmark the URL to share specific subnet calculations.

Frequently Asked Questions

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