Class D address regardless of the network address and host address. The first four digits of its 1st bytes are fixed as 1110. (2) Class D address range: 224.0.0.1 to 239.20.255 Class D address for Multi-Point broadcasting. The first byte of A Class d ip address starts with "lll0". It is a reserved address. It does not point to a specific network. Currently, this type of address is used in multi-point broadcast (Multicast. A multicast address is used to address a group of computers at a time. It identifies a group of computers that share the same protocol. Class D addresses are divided into three types: Private addresses, public addresses, and private addresses. Private addresses (224.0.0.0-224.0.0.255) are used for broadcast of network protocol groups and public addresses (224.0.1.0-238.255.255.255) used for other multicast scenarios. The private IP address (239.0.0.0-239.255.255.255) is used for testing. In IPv6, the first byte must be 0xff.