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Home/ Blog/ When buying a residential proxy, is it better to choose IPv4 or IPv6?

When buying a residential proxy, is it better to choose IPv4 or IPv6?

PYPROXY PYPROXY · Aug 25, 2025

When it comes to purchasing residential proxies, one of the key decisions users face is whether to choose IPv4 or IPv6. Both protocols offer different advantages and limitations, and the choice largely depends on the specific requirements of the user. In this article, we will explore the differences between IPv4 and IPv6 in the context of residential proxies, analyzing their benefits, potential drawbacks, and best use cases. By understanding these differences, users can make an informed decision about which protocol is more suitable for their needs.

Understanding IPv4 and IPv6

Before diving into the pros and cons of each protocol, it’s essential to understand what IPv4 and IPv6 are.

- IPv4 (Internet Protocol version 4): IPv4 is the most widely used internet protocol today. It operates on a 32-bit addressing scheme, which provides around 4.3 billion unique IP addresses. Although IPv4 has been a reliable standard for decades, the rapid growth of internet-connected devices has led to the depletion of available IPv4 addresses. This scarcity has caused various problems, leading to the development of IPv6.

- IPv6 (Internet Protocol version 6): IPv6 is the newer version of the Internet Protocol, designed to address the limitations of IPv4. It uses a 128-bit addressing scheme, which allows for an almost unlimited number of unique IP addresses. With IPv6, the issue of address scarcity is virtually eliminated, and it also offers enhanced security and efficiency features.

Key Differences Between IPv4 and IPv6 for residential proxy Use

Now that we have a basic understanding of the two protocols, let’s look at how they differ when it comes to residential proxies.

1. Address Availability

One of the most significant differences between IPv4 and IPv6 is the availability of addresses.

- IPv4: Due to its 32-bit structure, IPv4 can only provide around 4.3 billion unique IP addresses. With the rapid expansion of the internet, these addresses have been exhausted. As a result, IPv4 addresses are now considered a limited resource. This scarcity has led to the rise of techniques like IP address sharing and carrier-grade NAT (Network Address Translation) to maximize the utility of available IPv4 addresses.

- IPv6: With its 128-bit addressing structure, IPv6 can theoretically provide 340 undecillion unique IP addresses (that’s 340 followed by 36 zeros). This immense availability of addresses means that IPv6 is not constrained by the same address scarcity as IPv4, making it ideal for large-scale proxy networks where a vast number of unique IPs are required.

2. Anonymity and Security

Anonymity and security are critical factors when choosing a proxy, especially for users involved in activities that require a high degree of privacy.

- IPv4: IPv4 networks are more likely to use NAT, which can sometimes reduce the level of anonymity. Since many users may share the same public IP address, tracking activities back to an individual can be more challenging. However, IPv4 has been around for decades, and its security features have been refined over time.

- IPv6: IPv6 addresses are generally more private and secure compared to IPv4. IPv6 makes it easier to implement end-to-end encryption, which is essential for maintaining the security of data. Additionally, IPv6 can reduce the reliance on NAT, improving anonymity and making it harder for third parties to track users based on their IP addresses.

3. Performance and Speed

Another important factor to consider is the speed and overall performance of the proxy network.

- IPv4: Since IPv4 has been the standard for so long, it is highly optimized for performance in most regions of the world. However, the heavy reliance on NAT and other workarounds can sometimes cause latency issues, especially in highly congested networks. As IPv4 addresses become scarcer, the quality of these proxies can degrade due to overuse or overcrowding.

- IPv6: IPv6 can offer better performance in certain circumstances, especially when dealing with direct peer-to-peer connections. The reduced need for NAT means fewer hops between devices, leading to faster and more efficient data transmission. Additionally, IPv6 is better suited for mobile networks, as it can improve connection reliability and reduce latency.

4. Compatibility with Websites and Services

- IPv4: Since IPv4 has been the internet standard for so long, most websites and online services are fully compatible with it. Almost all networks, servers, and devices are optimized for IPv4, making it a universally accepted protocol.

- IPv6: Although IPv6 adoption is increasing, not all websites and services are fully compatible with IPv6. In regions where IPv6 infrastructure is still being developed, users may experience compatibility issues when trying to access certain content. However, the trend is shifting, and many major websites are beginning to offer full support for IPv6.

5. Cost Considerations

- IPv4: Due to the scarcity of IPv4 addresses, the cost of acquiring IPv4 proxies is generally higher. The limited availability and high demand for IPv4 addresses often drive up prices. Additionally, many proxy providers charge premium prices for high-quality, dedicated IPv4 proxies.

- IPv6: IPv6 proxies tend to be more affordable than IPv4 proxies, primarily because of the abundance of available IP addresses. Since IPv6 address allocation is not as restrictive, proxy providers can offer more competitive pricing for IPv6 proxies.

Which One Should You Choose for Residential Proxy Buy?

The choice between IPv4 and IPv6 depends on several factors, including your specific use case, budget, and performance requirements.

- Choose IPv4 if: You need proxies that are universally compatible and are primarily concerned with accessing content that may still rely on IPv4. IPv4 is also a good choice if you require proxies for activities where anonymity and security are not the primary concern.

- Choose IPv6 if: You need a large volume of proxies for large-scale operations, and you are looking for better performance, security, and cost-efficiency. IPv6 is a better choice for those who require proxies for activities where privacy and security are paramount, and you are willing to work around potential compatibility issues with some websites.

Both IPv4 and IPv6 have their strengths and weaknesses when it comes to residential proxies. IPv4 remains the most widely used protocol, with excellent compatibility and reliable performance. However, IPv6 offers vast address availability, enhanced security, and better performance in some situations. Ultimately, the decision between IPv4 and IPv6 depends on your specific needs, the type of tasks you plan to use the proxies for, and your budget. By understanding these factors, you can choose the protocol that best aligns with your requirements.

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