CIDR Calculator

Calculate IP address range by CIDR notation.

CIDR Calculator

Convert CIDR notation to IP address range and back. Supports IPv4: calculate mask, range, wildcard mask and address count.

CIDR to IP range conversion
Mask and wildcard mask calculation
Number of addresses in block

How to Use

  1. Enter an IP address in CIDR format (e.g., 192.168.1.0/24)
  2. Click the range calculation button
  3. Review start and end IP, mask and address count
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