IPv4 vs IPv6: 7 Key Differences Explained
Analytics Insight, Tuesday, November 3rd, 2026
Seven key differences between IPv4 and IPv6, from 32-bit vs 128-bit addresses to autoconfiguration, security and performance.
IPv4 uses 32-bit addresses and supports about 4.3 billion unique addresses, which is no longer enough for the growing number of connected devices.
IPv6 uses 128-bit addresses, offering about 340 undecillion possibilities for phones, computers, smart home devices and future technology.
IPv4 relies on manual setup or DHCP, while IPv6 adds Stateless Address Autoconfiguration so devices can configure themselves.
The Analytics Insight explainer also compares the two on security, speed, connectivity and network performance.