A block of numbers given away for free in the 1980s can now be worth more than a commercial skyscraper. IP addresses — the numerical foundation of every internet connection — have become one of the most fiercely contested resources in the digital economy.

In this episode, we trace how a 32-bit addressing scheme designed for an experimental research network became a scarce commodity. We examine the rigid classful system that wasted millions of addresses, the emergency inventions of CIDR and NAT that kept the internet alive, the rise of Regional Internet Registries, and the secondary market where legacy holders sell addresses for tens of dollars each. We also explore the difference between Provider-Aggregatable and Provider-Independent space, the power of BGP multi-homing, and why the transition to IPv6 remains unfinished decades after it was designed.

This is the story of digital real estate, scarcity, and the quiet struggle over who controls the routing of the global internet.

Key Topics Covered

- IPv4’s 32-bit address space and early ARPANET constraints

- John Postel, “Jon’s notebook,” and the origins of IANA

- Classful addressing (Classes A, B, C) and its massive inefficiency

- Router memory pressure and TCAM limitations

- Classless Inter-Domain Routing (CIDR) and variable-length subnetting

- RFC 1918 private addressing and Network Address Translation (NAT)

- The end-to-end principle and how NAT broke it

- Regional Internet Registries (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC)

- Provider-Aggregatable (PA) vs. Provider-Independent (PI) space

- BGP multi-homing and carrier independence

- IPv4 exhaustion, the secondary market, and address brokerage

- Geopolitical tensions and the AFRINIC governance crisis

- IPv6 scale, dual-stack transition, and translation mechanisms

Core Idea

IPv4 addresses were never designed to be scarce. A temporary 32-bit architecture became permanent, creating artificial scarcity that reshaped routing, economics, and geopolitics. NAT and CIDR bought decades of survival, but at the cost of the original end-to-end ideal. True resolution requires the still-incomplete migration to IPv6’s effectively unlimited address space — restoring both numerical abundance and the possibility of a pure peer-to-peer internet.

#IPv4, #IPAddresses, #CIDR, #NetworkAddressTranslation, #IPv6, #BGP, #RegionalInternetRegistries, #ProviderIndependent, #AddressExhaustion, #DigitalScarcity

Source

Legarski, Ronald. The History of the Internet - From Its Foundations to the Present. SOLVEFORCE®

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