MCSE log

Classes of IP addresses,

Class A : 1-126 : 1.0.0.1 to 126.255.255.254
Class B : 128-191 : 128.1.0.1 to 191.255.255.254
Class C : 192-223 : 192.0.1.1 to 223.255.254.254
Class D : 224-239 : 224.0.0.0 to 239.255.255.255
Class E : 240-254 : 240.0.0.0 to 254.255.255.254

pecial address ranges

Some addresses are reserved for special uses (RFC 3330).^[2]

Address range	CIDR Equivalent	Purpose	RFC	Class	Total # of addresses
0.0.0.0 - 0.255.255.255	0.0.0.0/8	Zero Addresses	RFC 1700	A	16,777,216
10.0.0.0 - 10.255.255.255	10.0.0.0/8	Private IP addresses	RFC 1918	A	16,777,216
127.0.0.0 - 127.255.255.255	127.0.0.0/8	Localhost Loopback Address	RFC 1700	A	16,777,216
169.254.0.0 - 169.254.255.255	169.254.0.0/16	Zeroconf / APIPA	RFC 3330	B	65,536
172.16.0.0 - 172.31.255.255	172.16.0.0/12	Private IP addresses	RFC 1918	B	1,048,576
192.0.2.0 - 192.0.2.255	192.0.2.0/24	Documentation and Examples	RFC 3330	C	256
192.88.99.0 - 192.88.99.255	192.88.99.0/24	IPv6 to IPv4 relay Anycast	RFC 3068	C	256
192.168.0.0 - 192.168.255.255	192.168.0.0/16	Private IP addresses	RFC 1918	C	65,536
198.18.0.0 - 198.19.255.255	198.18.0.0/15	Network Device Benchmark	RFC 2544	C	131,072
224.0.0.0 - 239.255.255.255	224.0.0.0/4	Multicast	RFC 3171	D	268,435,456
240.0.0.0 - 255.255.255.255	240.0.0.0/4	Reserved[3],[4],[5]	RFC 1166	E	268,435,456

[edit] See also