CIDR Calculator

Network, broadcast, host range, and masks for an IPv4 block. Enter a CIDR like 10.0.0.0/8 or an address followed by a netmask.

IPv4 only · /31 and /32 follow RFC 3021

Address192.168.1.10
Network192.168.1.0/24
Broadcast192.168.1.255
First host192.168.1.1
Last host192.168.1.254
Usable hosts254
Total addresses256
Netmask255.255.255.0
Wildcard mask0.0.0.255
Address typePrivate (RFC 1918)

Binary

Address11000000.10101000.00000001.00001010
Netmask11111111.11111111.11111111.00000000