IPv4 Subnet Calculator

Enter an IPv4 address and CIDR to compute network, broadcast, host range, mask, wildcard, host counts, and binary representation.

Runs entirely in your browser — nothing is uploaded

IP / CIDR

Class

Subnet mask

255.255.255.0

Wildcard mask

0.0.0.255

Network

192.168.1.0/24

Broadcast

192.168.1.255

First host

192.168.1.1

Last host

192.168.1.254

Total addresses

256

Usable hosts

254

Binary view

11000000.10101000.00000001.00101010

Mask

11111111.11111111.11111111.00000000

Network

11000000.10101000.00000001.00000000

Broadcast

11000000.10101000.00000001.11111111