Network

CIDR calculator

Calculate IPv4/IPv6 CIDR ranges, containment and splits

CIDR / IP address

CIDR notation

ResultsIPv4

Network192.168.10.0/24

TypePrivate (RFC 1918)

Netmask255.255.255.0

Wildcard0.0.0.255

Broadcast192.168.10.255

Prefix/24

First host192.168.10.1

Last host192.168.10.254

Total addresses256

Usable hosts254

Contains check

IP / CIDR

Inside the network range

Split into subnets

New prefix/

192.168.10.0/26192.168.10.0 – 192.168.10.63
192.168.10.64/26192.168.10.64 – 192.168.10.127
192.168.10.128/26192.168.10.128 – 192.168.10.191
192.168.10.192/26192.168.10.192 – 192.168.10.255

How to use / Notes

How to use

Enter an IPv4 or IPv6 CIDR.
Read the address range and count.
Test containment or split into subnets.

Notes

IPv6 ranges are vast, so totals may be shown approximately.