Type network address range
A 1.0.0.0 to 126.0.0.0 is valid 0.0.0.0 and 127.0.0.0
B 128.1.0.0 to 191.254.0.0 valid 128.0.0.0 and 191.255.0.0 Reserved
C 192.0.1.0 to 223.255.254.0 is valid from 192.0.0.0 and 223.255.255.0
D224.0.0.0 to 239.255.255.255 for multi-channel broadcasting
E 240.0.0.0 to 255.255.255.254 Reserved 255.255.255.255 for broadcast
