Class A addresses range from to . The first bit is always . With only bits for the network portion, there are Class A networks. Each contains usable hosts. Organizations like Apple, Ford, and the US Department of Defense own entire Class A blocks. Most were assigned in the early internet days when million addresses seemed reasonable.
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$ curl repovive.com/roadmaps/network-design/ip-addressing-and-subnetting/class-a-networks
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