Why You Would Want to Use IPv6

Introduction

IPv6 is becoming more important as businesses prepare for long-term internet growth. It offers a much larger address space than IPv4 and supports modern network expansion, especially for cloud services, mobile networks, IoT, hosting, and global digital infrastructure.

However, IPv6 adoption is not yet complete. Many businesses still rely on IPv4 for compatibility, customer access, email systems, hosting, and legacy applications. This means the real question is not whether IPv6 is useful, but how businesses should adopt IPv6 while maintaining IPv4 continuity.

For many organizations, the best strategy is a practical one: prepare for IPv6, but keep IPv4 available where customers and systems still depend on it.

What is IPv6?

IPv6, or Internet Protocol version 6, is the newer version of the Internet Protocol used to identify and connect devices across the internet. It was created to solve the address limitation of IPv4, which uses a 32-bit address system and supports about 4.3 billion unique addresses.

IPv6 uses a 128-bit address system, giving networks a much larger pool of available addresses. This makes it suitable for long-term internet growth, especially as more devices, applications, and online services require direct connectivity.

Why businesses use IPv6

Businesses use IPv6 because the internet continues to grow beyond the limits of IPv4. Cloud platforms, mobile networks, IoT devices, content delivery systems, and global hosting providers all need scalable addressing.

IPv6 helps organizations prepare for future demand by making it easier to assign unique addresses across large networks. It also supports cleaner network architecture in environments where direct device-to-device communication is important.

For businesses planning long-term infrastructure, IPv6 is not only a technical upgrade. It is part of future-ready network planning.

Key benefits of IPv6

1. Larger address space

The biggest benefit of IPv6 is its much larger address space. IPv4 address availability is limited, while IPv6 provides enough address capacity to support future internet growth.

This is important for businesses that manage many servers, customer devices, virtual machines, cloud workloads, or connected products.

2. Better support for network growth

IPv6 makes it easier for networks to scale. Instead of relying heavily on address sharing or complex workarounds, businesses can design networks with more direct addressing and clearer allocation structures.

This can be useful for internet service providers, hosting companies, data centres, SaaS platforms, and enterprises with growing infrastructure needs.

3. Reduced dependence on NAT

Many IPv4 networks rely on Network Address Translation, commonly known as NAT, because public IPv4 addresses are limited. NAT allows multiple devices to share one public IPv4 address, but it can also add complexity to troubleshooting, routing, application performance, and network design.

IPv6 reduces the need for NAT by allowing more devices to have unique addresses. This can simplify certain network environments, especially at scale.

4. Better preparation for IoT and connected devices

IoT devices, sensors, mobile devices, smart systems, and edge networks all increase demand for IP addresses. IPv6 is designed to support this type of growth.

For businesses building connected products or managing large device networks, IPv6 can provide a stronger foundation for future deployment.

5. Long-term compatibility with modern internet infrastructure

As more networks, platforms, and services support IPv6, businesses that prepare early can avoid future compatibility issues. IPv6 readiness may become increasingly important for cloud services, telecom networks, government systems, and international connectivity.

IPv6 and network security

IPv6 can support secure network design, but it should not be treated as automatically secure by default. Like IPv4, IPv6 still requires proper firewall rules, monitoring, access control, routing policies, and security configuration.

A common mistake is enabling IPv6 without updating security tools and policies. If a business only monitors IPv4 traffic while IPv6 is active, it may create visibility gaps.

For this reason, IPv6 adoption should always include a security review. Businesses should check whether their firewalls, intrusion detection tools, logging systems, and network teams are ready to manage IPv6 traffic properly.

IPv6 adoption challenges

Although IPv6 has many benefits, adoption can still be challenging. IPv6 is not always a simple plug-and-play replacement for IPv4.

Common challenges include:

Legacy systems that only support IPv4
Applications that are not fully tested on IPv6
Network teams with limited IPv6 experience
Security tools that are still focused mainly on IPv4
Customers or partners that still depend on IPv4
Operational complexity from running IPv4 and IPv6 together

This is why many businesses adopt IPv6 gradually instead of switching everything at once.

Why IPv4 still matters

Even as IPv6 adoption grows, IPv4 remains widely used across the global internet. Many users, services, devices, and enterprise systems still depend on IPv4 connectivity.

For businesses, IPv4 is still important for website access, hosting, email deliverability, VPNs, enterprise systems, customer networks, and compatibility with older infrastructure.

This means IPv6 should be seen as part of a transition strategy, not an immediate replacement for IPv4 in every environment.

IPv6 and IPv4 together: dual-stack strategy

Many businesses use a dual-stack strategy. This means their network supports both IPv4 and IPv6 at the same time.

Dual-stack allows a business to serve IPv6-ready users while still supporting customers, applications, and systems that rely on IPv4. This is often the safest approach during the transition period.

For example, a hosting provider may enable IPv6 for modern customers while continuing to lease IPv4 addresses for clients that still need IPv4 access. A SaaS company may prepare its infrastructure for IPv6 while keeping IPv4 available for enterprise users and legacy integrations.

What businesses should plan before using IPv6

Before moving to IPv6, businesses should review both technical readiness and business continuity needs.

Key questions include:

Does your ISP or hosting provider support IPv6?
Are your applications tested on IPv6?
Can your DNS, firewall, and monitoring systems support IPv6?
Do your customers still need IPv4 access?
Will your team manage IPv4 and IPv6 together?
Do you need IPv4 leasing during the transition?

A strong IPv6 plan should reduce future risk without disrupting current operations. For many businesses, this means preparing for IPv6 while keeping reliable IPv4 resources available.

Final thoughts

IPv6 is important because it gives the internet room to grow. It supports larger networks, more connected devices, and long-term infrastructure planning.

However, IPv4 still plays a major role in today’s internet. Many businesses cannot move away from IPv4 immediately because customers, applications, and systems still depend on it.

The practical approach is to prepare for IPv6 while maintaining IPv4 continuity. Businesses that plan for both will be better positioned for future growth, smoother migration, and more reliable connectivity.

If your organization needs IPv4 resources during the transition, i.lease provides a marketplace for businesses looking to access IP address space with greater flexibility.

Frequently Asked Questions

1. What is IPv6 used for?

IPv6 is used to identify and connect devices across the internet. It provides a much larger address space than IPv4 and supports long-term network growth.

2. Why should businesses use IPv6?

Businesses should use IPv6 to prepare for future internet growth, support more devices, improve network scalability, and reduce long-term dependence on limited IPv4 address space.

4. Is IPv6 faster than IPv4?

IPv6 is not automatically faster than IPv4 in every situation. Performance depends on network routing, provider support, configuration, and location. In some networks, IPv6 may perform better, while in others IPv4 may still be more reliable.

5. Does IPv6 replace IPv4?

IPv6 is designed to solve IPv4 address limitations, but IPv4 has not disappeared. Many businesses still use IPv4 and IPv6 together through a dual-stack setup.

6. Do I still need IPv4 if I use IPv6?

In many cases, yes. Businesses may still need IPv4 to support customers, applications, email systems, hosting environments, and legacy networks that are not fully IPv6-ready.

7. What is dual-stack networking?

Dual-stack networking means running IPv4 and IPv6 at the same time. It allows businesses to support modern IPv6 connectivity while maintaining compatibility with IPv4 users and systems.

8. Can IPv4 leasing help during IPv6 transition?

Yes. IPv4 leasing can help businesses maintain IPv4 connectivity while they gradually prepare, test, and deploy IPv6 across their networks.