Everything You Need to Know About IPv4 vs. IPv6

The “IP” in IPv4 and IPv6 stands for Internet Protocol, which is a set of rules that determine how devices transmit data packets across the Internet. Internet Protocol also assigns a unique address to each device on the web. These addresses ensure data packets are routed to the correct device.

What is IPv4?

With IPv4, a typical IP address has 32 bits and is in dotted-decimal form, like this:

Because there are only 232 unique hosts in this decimal format, there are only about 4.3 billion IPv4 addresses.

What is IPv6?

IPv6 addresses are written in hexadecimal format, like this:


The Pros of IPv4 vs. IPv6

  1. Existing infrastructure — Most websites use IPv4, even those that also support IPv6. This makes version four a more seamless experience. That is, until most of the Internet switches to version six.
  2. Simplicity — IPv4’s 32-bit dotted decimal is much smaller and simpler than IPv6’s hexadecimal numbers. This simplicity is easier for humans to read.
  3. Support — Because most traffic is still using IPv4, Network operators find IPv4 familiar. They may wait until more traffic is IPv6 before they make any decisions about their own infrastructure — especially if they have enough IPv4 addresses for the near future.

The Cons of IPv4 vs. IPv6

  1. Exhaustion of IPv4 — As we’ve covered, the world is short on IPv4 addresses. This means there’s a cost to buy IPv4 addresses, where IPv6 addresses can be had (in unimaginable quantities) for the cost of registration with a regional registry (RIR). You also pay registry costs with IPv4.
  2. IPv6 Speed — Web and cloud services provider, Akamai, measured the speed of IPv6 vs. IPv4. They found, “Sites load 5% faster in median and 15% faster for the 95% percentile on IPv6 compared to IPv4.”
  3. Network Address Translation (NAT) for IPv4 — NAT allows a group of devices (usually 10–20) that share a single public IP with IPv4. This requires complex configurations like forwarding and firewall alterations. Because IPv6 has so many addresses, IPv6 devices don’t require additional configuration.

Understanding the IPv4 market

When a company needs more IP addresses, they have three options:

  1. Buy IPv4 addresses — That’s what IPv4.Global is here for. Companies can also sell their IPv4 addresses if they’re beginning to deploy IPv6.
  2. Use NAT — As mentioned above, NAT allows one address to be shared among many devices. However, NAT still requires one IPv4 address (usually one per 10–20 people). This has some drawbacks, namely speed issues as packets have to transition paths.
  3. Deploy IPv6 — A business can deploy IPv6, but this may be of limited usefulness until most traffic is also on IPv6. So, even if a business deploys IPv6, it still needs more IPv4 addresses or NAT.

In Conclusion

As trusted marketplace leaders, IPv4.Global is dedicated to reliable transparent service. With more completed transfers than anyone else, we get results.

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