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A comment on 2038: Only 21 years away. Parent comment

Re:2038: Only 21 years away by jcranmer on Tuesday March 21, 2017 @01:05PM (#13924092)
It supported billions of addresses, but only millions of networks. The registry could only give out 128 16-million address chunks, 16,384 64k chunks, and ~2M 256 address chunks.

IPv4 was running out of class B's, those 64k address chunks, when CIDR was introduced.

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