IP Calculator

Enter an IPv4 address and CIDR prefix to calculate subnet, network and host information.

Example: 192.168.1.10 /24

Subnet Calculation Results

Input IP
192.168.1.10
CIDR Prefix
/24
CIDR Network
192.168.1.0/24
Network Address
192.168.1.0
Broadcast Address
192.168.1.255
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
Binary Subnet Mask
11111111.11111111.11111111.00000000
First Usable IP
192.168.1.1
Last Usable IP
192.168.1.254
Total Addresses
256
Usable Addresses
254

IPv4 /31 networks are treated according to RFC 3021 for point-to-point links. A /32 represents a single IPv4 host.