Karthik Kadambi | Blog · Jan 10, 2026
IPv6 Explained | The Future of Internet Addressing
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The primary driver for IPv6 was the exhaustion of IPv4 addresses. IPv4 uses 32-bit addresses, allowing for about 4.3 billion unique addresses. In the early days of the Internet, this seemed like plenty. However, with the explosion of mobile devices, IoT, and always-on servers, we ran out. IPv6 uses 128-bit addresses , which allows for approximately 340 undecillion ($3.4 times 10^{38}$) addresses.…
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