// IP & CIDR Explorer

// Interactive IPv4 subnet analysis tool

CIDR Notation

. . . /

Invalid CIDR notation. Expected format: A.B.C.D/prefix (prefix 0-32)

Parent CIDR

. . . /

Split into /{prefix}

CIDR Block

. . . /

IP or CIDR to test

. . . /

IPv4 Classes

Private Ranges (RFC 1918)

CIDR	Range	Use
10.0.0.0/8	10.0.0.0 – 10.255.255.255	Class A private
172.16.0.0/12	172.16.0.0 – 172.31.255.255	Class B private
192.168.0.0/16	192.168.0.0 – 192.168.255.255	Class C private
127.0.0.0/8	127.0.0.0 – 127.255.255.255	Loopback
169.254.0.0/16	169.254.0.0 – 169.254.255.255	Link-local (APIPA)
0.0.0.0/8	0.x.x.x	This network
100.64.0.0/10	100.64.0.0 – 100.127.255.255	Shared addr (CGN)
224.0.0.0/4	224.0.0.0 – 239.255.255.255	Multicast
240.0.0.0/4	240.0.0.0 – 255.255.255.254	Reserved
255.255.255.255/32	255.255.255.255	Limited broadcast

Common CIDR Blocks

Prefix	Addresses	Usable Hosts	Mask