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Subnet Calculator

Fast IPv4 / CIDR subnet calculator for network planning & documentation.

IPv4 / CIDR Input Live Calculator

Tip: click a preset below to try common private ranges.

192.168.1.0/24 Home LAN
10.0.0.0/24 Private
172.16.0.0/16 Private
/26 64 hosts
/30 Point-to-point

Results Awaiting input

Network Address
Broadcast Address
First Usable
Last Usable
Total Addresses
Usable Hosts
Subnet Mask
Wildcard Mask
Binary View
Enter an IP and CIDR to see bit-level details.