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Sources
- RFC 4632: CIDR
- RFC 1918: private address space
- RFC 3021: 31-bit prefixes on point-to-point links
- RFC 6598: shared address space 100.64.0.0/10
- IANA IPv4 special-purpose address registry
Formulas checked against the sources above and our worked-example tests on 2026-10-16. Code sections are cited by number only; read the text in your adopted edition. Planning aid, not engineering, legal or code advice.