IP Tools — Subnet Calculator & IPv6
A unified IP toolkit. Calculate IPv4 subnet details from CIDR notation — including network/broadcast addresses, usable hosts, subnet mask, and IP class. Also expand abbreviated IPv6 addresses to full form or compress them to shortest notation. All processing runs in your browser.
IP Address
192.168.1.0
Subnet Mask
255.255.255.0
Wildcard Mask
0.0.0.255
Network Address
192.168.1.0
Broadcast Address
192.168.1.255
First Usable Host
192.168.1.1
Last Usable Host
192.168.1.254
Usable Hosts
254
IP Class
C
IP Type
Private
Binary
11000000.10101000.00000001.00000000
CIDR
192.168.1.0/24