127 loopback test address, therefore, the actual scope of the ip address is a class A 1-126.
Class B 128.0.0.0 - 191.255.255.255 netMask: 255.255.0.0
wherein 128.0.0.0 and 191.255.0.0 reserved ip, the actual range is 128.1.0.0-191.254.0.0
Class C 192.0.0.0-223.255.255.255 netMask: 255.255.255.0
wherein 192.0.0.0 to 223.255.255.0 and retention ip, the actual range is 192.0.1.0-223.255.254.0
Class D 224.0.0.0-239.255.255.255 multicast
Class E 240-255.255.255.254 reserved for use, 255.255.255.255 broadcast address