Subnet Calculator
Calculate network, broadcast, host range, and mask from an IPv4 CIDR.
Subnet details
Derived from the CIDR block
Binary view
Address, mask, and network in binary
About the Subnet Calculator
Enter an IPv4 address with a CIDR prefix to instantly see the network address, broadcast address, usable host range, subnet mask, wildcard mask, and total host count — plus a binary breakdown of the address and mask.
Examples
/24 network
192.168.1.10/24Output
Network 192.168.1.0, Broadcast 192.168.1.255, 254 hostsKeyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Frequently asked questions
Read more
- Subnetting and CIDR explained without the headache
What a /24 actually means, how to calculate usable hosts, and how to read a CIDR range without a lookup table.
Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser