Does Your Internet Connection Support IPv6?

What is an IP Address?

Every device connected to the Internet needs an IP address. An IP address works like a digital address that helps data travel from one device to another. When you browse a website, watch a video, send an email, or use a mobile application, IP addresses are used in the background to deliver traffic correctly.

There are two main versions of IP addresses in use today:

Understanding IPv4

IPv4 has been used for decades and remains common across home broadband, mobile networks, enterprise environments, and data centres. Addresses are written as four decimal numbers separated by dots.

Example IPv4 addresses:
XXX.168.1.10
XXX.8.8.8
XXX.0.113.25

IPv4 can provide around 4.3 billion unique addresses. That looked like an enormous number when the Internet was originally designed — but today it is not enough. Smartphones, laptops, IoT devices, cloud platforms, smart TVs, CCTV cameras, and enterprise systems all require network connectivity, and the pool ran out faster than anyone expected.

Understanding IPv6

IPv6 was created to overcome the address limitation of IPv4. It uses 128-bit addresses, which provides a practically unlimited number of unique addresses — enough for every device on Earth, many times over.

Example IPv6 addresses:
XXXX:c00:1234:5678::1
XXXX:4860:4860::8888
XXXX:1450:4009:81a::200e

IPv6 is designed for the modern Internet where billions of devices need direct, scalable, and future-ready connectivity — without the workarounds that IPv4 shortage forced upon us.

Why IPv4 Address Shortage Became a Problem

The global demand for Internet connectivity grew far faster than anyone anticipated. Mobile broadband, cloud services, enterprise digital transformation, online learning, remote work, IoT, and streaming platforms created a massive demand for IP addresses.

Because IPv4 address space is limited, many Internet Service Providers and organisations can no longer easily obtain new public IPv4 address blocks. IPv4 addresses became expensive assets — traded and sold like property — rather than a freely available resource.

NAT and CGNAT: How Networks Survived IPv4 Shortage

NAT, or Network Address Translation, allows multiple private devices to share a single public IPv4 address. This is used in almost every home router and enterprise network today.

Laptop:   XXX.168.1.10  ─┐
Phone:    XXX.168.1.11  ─┤─→  Home Router NAT  →  One Public IPv4 Address
Smart TV: XXX.168.1.12  ─┘

Many ISPs go a step further and use Carrier Grade NAT (CGNAT) — sharing a single public IPv4 address across hundreds or thousands of customers at the ISP network level.

NAT and CGNAT extended the life of IPv4, but they introduced real operational challenges:

• Difficulty hosting servers or services from home connections
• Port forwarding limitations and broken peer-to-peer applications
• Gaming, VoIP, and video call connectivity issues
• More complex troubleshooting — the visible source IP is no longer the real device
• Additional translation layers that increase latency and failure points
• Cybersecurity investigations become harder without source port logging

Why ISPs Are Moving to IPv6

Internet Service Providers are deploying IPv6 because it eliminates the root cause of CGNAT complexity. With IPv6, every customer and device can receive a globally routable address without sharing. This simplifies network architecture, reduces operational overhead, and supports long-term growth.

For ISPs, IPv6 also enables cleaner service design — no more layered NAT tables, simpler traffic logging, and a straightforward path to scaling capacity as subscriber numbers grow.

Benefits of IPv6

1. Future-Ready Internet Connectivity

IPv6 is the long-term direction of the Internet. Enabling it now helps users and organisations prepare for future applications, device ecosystems, and service platforms that increasingly assume IPv6 availability.

2. Massive, Non-Exhaustible Address Space

IPv6 provides 340 undecillion addresses — a number so large that every grain of sand on Earth could have billions of IP addresses. Address exhaustion is simply not a concern.

3. Reduced Dependency on NAT

IPv6 restores the original end-to-end model of the Internet. Devices can communicate directly without requiring address translation, which improves reliability and simplifies troubleshooting.

4. Better Support for Modern Applications

Video conferencing, gaming, IoT sensors, remote access tools, and peer-to-peer applications all benefit from simpler, direct connectivity when IPv6 is properly deployed.

5. Easier Network Expansion

Organisations planning cloud migration, smart office deployments, or IoT platforms can design cleaner and more scalable networks from the start with IPv6, avoiding the complexity of overlapping private address ranges.

6. Improved Operational Simplicity Over Time

While IPv6 requires planning and skill to deploy correctly, it removes the long-term complications of IPv4 shortage, CGNAT layers, and private address range conflicts that accumulate in complex networks.

IPv4 and IPv6 Working Together

IPv6 does not replace IPv4 overnight. Most modern networks use a dual-stack approach, where both IPv4 and IPv6 are active simultaneously. Your device may already have both types of address.

Dual-Stack Device:
  IPv4 Address: XXX.168.1.10          (private, NAT'd at router)
  IPv6 Address: XXXX:c00:abcd::10     (public, globally routable)

When a website supports IPv6, your device will automatically prefer it. If IPv6 is unavailable, it transparently falls back to IPv4 — so the transition is seamless for end users.

How to Check Whether Your Connection Supports IPv6

The easiest way to check IPv6 support is to visit an IP checking tool. A good IP check page will show whether your device has received a public IPv4 address, a public IPv6 address, or both.

Final Thoughts

IPv4 built the Internet we use today, but the future requires more scalable and open addressing. IPv6 is not just a technical upgrade — it is an important foundation for the next era of digital connectivity, from smart cities and autonomous systems to edge computing and beyond.

Whether you are a home user curious about your connection, an IT engineer planning a network upgrade, or an organisation preparing for cloud-first infrastructure — it is worth understanding where you stand on IPv6 adoption.