It is well-known that in the IP address range 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 are assigned as private IP addresses not routable to the Internet. The allocations of these IP addresses have somehow extended the life span of IPv4 address space.
Are there any private IP addresses in the Class D multicast range ? Yes, the range 239.255.0.0 - 239.255.255.255 are available for each organization to freely use. Right now, NOW TV and SUPERSUN are riding on this IP range to deliver their IPTV service. NOW and SUPERSUN could each have up to 65536 TV channels for their services. The limitation is that IPTV services delivered in such a way could not be routed to other networks.
Some broadband TV service providers are now using the GLOP address range 233.x.y.z. The value of x and y will be derived from their AS numbers. They will have the last octet freely available for them to use. In such a case, they will have 256 TV channels that could be delivered across the Internet.
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