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Re:I spent a week without IPv4 (2023) by throw0101c on Sunday December 21, 2025 @07:50AM (#46344471)
> The IPv4 address space should have been included in the IPv6 space […]

See IPv4-mapped ("IPv4-compatible") IPv6 addresses from RFC 1884 § 2.4.4 (from 1995) and follow-on RFCs:

* https://datatracker.ietf.org/doc/html/rfc1884

* https://en.wikipedia.org/wiki/IPv6#IPv4-mapped_IPv6_addresse...

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