class A ranges from 0 - 127 class B ranges from 128-191 class C ranges from 192-223 class D ranges from 224-248 class E ranges from 249- 254

Class A 1.0.0.1 to 126.255.255.254 Class B 128.1.0.1 to 191.255.255.254 Class C 192.0.1.1 to 223.255.254.254 Class D 224.0.0.0 to 239.255.255.255