Standfirst (20 words)

  • ISPs are turning idle IPv4 addresses into revenue streams, leverageing scarcity and leasing models while IPv6 adoption grows.

Introduction

Even as IPv6 expands globally, IPv4 addresses remain a scarce, highly valuable digital asset. For many Internet Service Providers (ISPs), idle IPv4 space is no longer just dormant infrastructure—it is a monetisable resource.

Service providers, cloud platforms, and enterprises continue to rely on IPv4 for legacy compatibility, customer connectivity, and hybrid cloud deployments. Companies such as LARUS have established themselves as facilitators in the IP leasing market, helping ISPs convert unused addresses into revenue.

The focussed is shifting from the theoretical debate of IPv6 replacing IPv4 to practical strategies for manageing and monetising IPv4 holdings effectively.

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Why IPv4 still matters for ISPs

IPv6 adoption, though growing, remains uneven. Many networks, enterprise systems, and customer devices are IPv4-only, meaning dual-stack deployment is required for full connectivity.

According to Heng.lu, “The dual-stack environment ensures that even IPv6-ready networks cannot abandon IPv4 entirely.” This creates continuous demand for IPv4 addresses, keeping them a strategic operational and economic asset.

IPv4 scarcity has created secondary markets where blocks are leased or sold. ISPs with surplus IPv4 space can now generate recurring revenue through structured leasing agreements, often retaining ownership while monetising idle assets.

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The ongoing value of IPv4: operational necessity and economic asset

While IPv6 adoption continues to grow, the reality is that IPv4 will not disappear anytime soon. This is not just about network compatibility; it’s about the bottom line. IPv4 addresses have turned into scarce, tradable commodities, with market dynamics supporting both short-term leasing and long-term strategic planning.

With many organisations still manageing dual-stack environments, IPv4 remains essential to keep global reach intact. Even as more businesses move towards IPv6 infrastructure, the inability to fully transition away from IPv4 continues to drive a market for addresses that offer both technical and economic value.

For ISPs, this scarcity is a goldmine. Leasing unused IPv4 blocks generates revenue while ensuring networks continue to operate effectively. For enterprises, holding on to surplus IPv4 addresses can provide flexibility for future projects and partnerships, securing business continuity in the long term.

Case study: monetising idle IPs in practise

A leading European ISP discovered 30,000 unused IPv4 addresses during a network consolidation project. Instead of letting them remain idle, the ISP partnered with LARUS to lease the addresses to cloud operators needing public IPv4 space.

The arrangement allowed the ISP to generate consistent revenue, while cloud customers gained temporary access to scarce IPv4 resources without long-term purchase commitments. This model reflects a wider trend: even with IPv6-ready infrastructure, IPv4 scarcity continues to drive market activity.

Cloud providers also reinforce this dynamic by charging premiums for IPv4 usage, highlighting the ongoing operational necessity and value of IPv4.

Why this trend will continue

Several factors suggest IPv4 monetisation will remain relevant:

  • Legacy dependence: Many networks and devices remain IPv4-only.
  • Operational certainty: IPv4 routing and troubleshooting are well established.
  • Economic incentives: Scarcity supports leasing and resale markets.

For ISPs and enterprises alike, unused IPv4 addresses have shifted from dormant resources to high-value digital capital, creating new revenue opportunities while supporting global network operations.

Conclusion

IPv4 may not be the future of Internet addressing, but its continued demand and scarcity in the present make it a valuable asset. For ISPs and businesses, recognising IPv4 as more than a relic of the past is key to ensuring ongoing profitability and operational stability.

While IPv6 is vital for the next phase of the Internet, IPv4 is far from obsolete. In fact, its ongoing relevance is supported by a combination of economic incentives, legacy dependencies, and global interoperability requirements. As long as the Internet remains dependent on a hybrid of IPv4 and IPv6, the demand for IPv4 will continue, ensuring its place in the digital economy for years to come.