Today, as e-commerce, data scraping, and social media account management become increasingly common, proxies have become a core part of modern online infrastructure. However, many users face the same question when purchasing proxies: platforms often offer both “IPv4 proxies” and “IPv6 proxies,” with different prices and descriptions — so which one should you choose? This article provides a complete decision-making guide, covering definitions, differences, selection criteria, and real-world use cases. I. What Are IPv4 Proxies and IPv6 Proxies? 1.IPv4 Proxy An IPv4 address consists of four groups of numbers ranging from 0–255 (such as 190.162.217.140), with a theoretical maximum of about 4.29 billion unique addresses. IPv4 proxies are built on this protocol and act as intermediaries between users and target websites, helping hide real IP addresses and bypass access restrictions. Advantages: Compatible with almost all platforms and tools, with a highly mature ecosystem and long-term proven stability.…