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Home/Other Calculators/Subnet Calculator

Subnet Calculator

Calculate IP subnet ranges and CIDR notation

IP Address

CIDR Prefix / Subnet Mask Bits

Other

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Written by the EachTools Team

Last updated: January 2026

How IP Subnet Calculations Work

Subnet calculators determine the network address, broadcast address, host range, and number of usable IPs for a given IP address and subnet mask.

Steps

Enter an IP address.
Enter the subnet mask or CIDR notation.
View the network address, broadcast, usable host range, and total hosts.