- Nortel’s $7.5 million IPv4 sale nearly collapsed when a registry claimed the addresses weren’t property.
- A dead clothing retailer had to be resurrected in court because nobody noticed its $2 million number collection.
When Numbers Become Property
When Nortel Networks filed for bankruptcy in 2009, its most valuable digital asset wasn’t patents or equipment—it was 666,624 IPv4 addresses. The subsequent sale to Microsoft for $7.5 million nearly collapsed when the American Registry for Internet Numbers (ARIN) intervened, arguing that the addresses weren’t property and couldn’t be sold “free and clear” of registry policies.
Industry Canada backed ARIN, submitting that “Internet Numbers never became the property of the persons who were authorised to use them.” U.S. Bankruptcy Judge Kevin Gross rejected this view in April 2011, ruling that legacy addresses allocated before ARIN existed could be sold as property. Microsoft signed a Legacy Registration Services Agreement post-sale but notably bypassed ARIN’s standard need-based assessment—establishing that bankruptcy courts could override RIR policy constraints.
Twelve years later, a Toronto clothing retailer called Dylex had to resurrect its dead bankruptcy proceedings after an IT consultant discovered 65,000 IPv4 addresses still registered in its name. The asset had been invisible to creditors in 2007. By 2022, it was worth over $2 million, but only if trustees could navigate ARIN’s need-based transfer requirements that didn’t exist when the company first failed.
These cases are not hypotheticals. They are the documented origin points of a market that has since processed 56,629 transfer transactions, leaving only 4.6 million IPv4 addresses in the global free pool as of late 2024.
The Fragmented Rulebook
What began as a technical coordination system has evolved into a fragmented regulatory landscape where five Regional Internet Registries govern a market trading at $18–$45 per address—with conflicting rules that can strand assets, delay mergers, and force companies to maintain parallel corporate structures just to hold number blocks.
The European Approach (RIPE NCC): Transfer-driven with minimal friction. No need-based justification required for intra-region moves, but a 24-month holding period applies to all transfers including mergers and acquisitions, preventing rapid speculation.
The North American Approach (ARIN): Conservation-focused. Recipients must demonstrate need for up to 24 months of supply. A 12-month “source freeze” prevents sellers from receiving new allocations immediately after transferring. Legacy addresses carry stronger property rights but require careful navigation of intervention risks.
The Asia-Pacific Constraint (APNIC): Maintains a five-year restriction on transferring addresses allocated from its final /8 pool (103/8), a policy that applies even to addresses acquired through corporate acquisitions.
A strategy legal in Amsterdam—acquiring addresses for speculative holding—may violate ARIN’s need-based requirements in Virginia. This divergence forces multinational operators to maintain separate legal entities and accounting systems for IP holdings in each region.
The Mechanics of Stranded Assets
Transfer restrictions now create liquidity risks across all RIR regions. Research into the 56,629 recorded transfers since 2012 reveals that approximately 26% involve fragmentation—splitting larger blocks into smaller ones. This reduces routing efficiency and can discount valuations by 15% to 30%.
Cross-region transfers require reciprocal, compatible policies between RIRs and can take months longer than intra-region transactions. For global M&A activity where IP assets must move across registry boundaries, this creates due diligence complexity that didn’t exist a decade ago.
The hidden costs compound. Companies operating across multiple RIR regions may need separate legal entities, distinct compliance teams, and parallel accounting systems just to manage number holdings—overhead that doesn’t exist for other asset classes.
The Audit Imperative
Dylex’s experience demonstrates that IPv4 holdings can remain hidden for years, only to resurface as complex liabilities. Nortel’s case shows that while legacy addresses may carry stronger property rights, they still require careful navigation of RIR intervention.
For current holders, the framework is straightforward. Map every block to its RIR region and identify holding-period restrictions. Monitor policy development processes that can alter transferability with limited notice. Factor regional diversification into acquisition strategy, but mind the interface costs between registries.
The IPv4 market has matured from a technical afterthought into a regulated asset class governed by five distinct policy frameworks. As the remaining 4.6 million addresses in the free pool dwindle, the companies that avoid stranded assets will be those that treat these numbers not as invisible infrastructure, but as regulated property subject to regional compliance regimes that can make or break balance sheet valuations.
