CIDR / Subnet Calculator

Calculate IP ranges, netmasks, and broadcast addresses from CIDR notation

CIDR Notation

Format: <ip-address>/<prefix-length> — e.g. 10.0.0.0/8

Examples

Network

192.168.1.0

Broadcast

192.168.1.255

Usable Hosts

254

IP Class

Network Details

Network Address192.168.1.0

Broadcast Address192.168.1.255

Subnet Mask255.255.255.0

Wildcard Mask0.0.0.255

First Usable Host192.168.1.1

Last Usable Host192.168.1.254

CIDR Range192.168.1.0/24

Total Addresses256

Usable Hosts254

Private Range192.168.0.0/16 (RFC 1918)

Binary Representation

Input IP11000000.10101000.00000001.00000000

Subnet Mask11111111.11111111.11111111.00000000

Network Addr11000000.10101000.00000001.00000000

Broadcast11000000.10101000.00000001.11111111

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