Subnet Calculator - Chomp Tools

Calculate subnet masks, CIDR notation & network ranges

IP Address

CIDR / Subnet Mask

How to use: Enter an IP address and either a CIDR notation (0-32) or subnet mask. The calculator will automatically compute all subnet details including network address, broadcast address, and usable host range.

CIDR Range Calculator

Network CIDR Block

Subnet Into (New CIDR)

Max Subnets to Display

CIDR Range Calculator: This tool helps you subdivide a larger network into smaller subnets. Enter a CIDR block (e.g., 192.168.0.0/16) and specify the new subnet size (e.g., /24) to see all possible subnets.

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