Is IP Subnet Calculator free?

Yes, IP Subnet Calculator is completely free to use with no signup required.

Does IP Subnet Calculator send my data to a server?

No. IP Subnet Calculator runs entirely in your browser using client-side JavaScript. Your data never leaves your device.

Calculate subnet mask, broadcast address, host range and binary representations from CIDR notation. Runs offline in your browser.

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Never leaves your browser

Calculate subnet mask, network address, broadcast address, and host range from any CIDR notation client-side.

IP Address / CIDR (e.g. 192.168.1.0/24)

Network Info

IP Address192.168.1.0/24

Subnet Mask255.255.255.0

Wildcard Mask0.0.0.255

Network Address192.168.1.0

Broadcast Address192.168.1.255

First Usable Host192.168.1.1

Last Usable Host192.168.1.254

Total Hosts256

Usable Hosts254

IP ClassC

Private RangeYes (RFC 1918)

Binary Representation

IP Address

11000000.10101000.00000001.00000000

Subnet Mask

11111111.11111111.11111111.00000000

Network Address

11000000.10101000.00000001.00000000