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IPv4 vs. IPv6: Why Companies Are Still Choosing to Buy IPv4 Addresses

The transition from Internet Protocol version 4 (IPv4) to Internet Protocol version 6 (IPv6) has been a long-discussed topic in the tech industry. IPv6 was introduced to address the imminent exhaustion of IPv4 addresses and to cater to the increasing demands of the internet-enabled world. Despite the advantages of IPv6, many companies are still choosing to buy IPv4 addresses. In this blog, we will explore the reasons behind this decision and understand why IPv4 remains relevant in today’s rapidly evolving digital landscape.


IPv4 and the Looming Shortage

IPv4, with its 32-bit addressing scheme, can support approximately 4.3 billion unique IP addresses. Although it seemed like an enormous number at the inception of the internet, the exponential growth of internet-connected devices and services has led to a global IPv4 address shortage. Regional Internet Registries (RIRs) have exhausted their IPv4 address pools, making it challenging for businesses to obtain additional IPv4 resources. This scarcity has prompted companies to seek ways to ensure continuity and expansion of their network infrastructure.


The Advantages of IPv6

IPv6, on the other hand, offers a massive address space with its 128-bit addressing scheme, capable of providing an astronomical number of unique IP addresses (approximately 340 undecillion). Apart from the obvious advantage of abundant address space, IPv6 boasts improved security features, simplified network configuration, and better support for mobile devices. Additionally, it eliminates the need for Network Address Translation (NAT), which can lead to more efficient end-to-end connectivity.


Challenges with IPv6 Adoption

Despite its advantages, the adoption of IPv6 has been relatively slow, and several challenges have hindered its widespread implementation. One major obstacle is the need for significant infrastructure and software upgrades to support IPv6. This upgrade process can be complex, time-consuming, and costly for businesses, particularly those with legacy systems. Furthermore, IPv6 adoption requires rethinking network design and security policies to ensure compatibility with the new protocol. This transition process can be disruptive and may result in temporary service interruptions if not handled meticulously.


IPv4’s Familiarity and Compatibility

IPv4 has been the dominant internet protocol for decades, and network administrators, developers, and IT professionals are highly familiar with its operation and nuances. This familiarity with IPv4 makes it the go-to choice for companies looking to maintain compatibility with existing systems, applications, and services. IPv4 also remains widely supported by network hardware, software, and internet service providers, ensuring seamless connectivity for users.


Market Availability and Cost-effectiveness

The IPv4 marketplace, facilitated by reputable brokers, has made it possible for companies to buy IPv4 addresses from organizations with surplus IP resources. This option allows businesses to expand their network infrastructure without undergoing the complete transition to IPv6. Additionally, the cost of acquiring IPv4 addresses can be relatively lower than the expenses involved in implementing IPv6.


Dual Stack Implementation

Many companies adopt a dual-stack approach, where both IPv4 and IPv6 coexist in their network infrastructure. This strategy allows businesses to gradually transition to IPv6 while maintaining IPv4 compatibility for existing systems. Dual stacking provides a smooth migration path and gives organizations the flexibility to adopt IPv6 at their own pace.



In conclusion, while the advantages of IPv6 are undeniable, companies continue to choose to buy IPv4 addresses due to various practical considerations. The scarcity of IPv4 addresses, combined with the familiarity, compatibility, and cost-effectiveness of IPv4, has made it a preferred choice for businesses seeking to expand their network infrastructure while maintaining compatibility with existing systems. The dual-stack implementation strategy further enables a seamless transition to IPv6 without compromising connectivity and functionality. As the world evolves, the importance of IPv6 will continue to grow, but IPv4 will remain a relevant and essential component of the internet for the foreseeable future.