Class Binary Prefix Range Network Bits A 0* 0.0.0.0-127.255.255.255 8 B 10* 128.0.0.0-191.255.255.255 16 C 110* 192.0.0.0-223.255.255.255 24 D 1110* 224.0.0.0-239.255.255.255 E 1111* 240.0.0.0-255.255.255.255