The Exhaustion of IPv4 Addresses and the Urgent Need for IPv6 Migration

IPv4, the foundational protocol of the Internet, is running out of address space, with North America now joining Asia, Europe and Latin America in exhausting its IPv4 allocations.

The American Registry for Internet Numbers (ARIN) announced that its IPv4 pool is depleted and can no longer satisfy large‑scale address requests, activating an “IPv4 Unmet Requests Policy” that lists a waiting list for servers.

ISPs currently have three options: obtain a smaller block (256 or 512 addresses), join the unmet‑request waiting list in hopes of future allocation, or purchase addresses from organizations with surplus IPv4 space.

Given these constraints, the article asks whether it is time to migrate to IPv6. IPv6, invented in 1998, uses 128‑bit addresses (e.g., FE80:0000:0000:0000:0202:B3FF:FE1E:8329) and provides roughly 3.4×10 18 possible addresses, enough for long‑term growth.

Despite its capacity, IPv6 adoption remains low; Google statistics show only about 7 % of Internet traffic uses IPv6, with Belgium and Switzerland leading in adoption.

The article concludes that accelerating IPv6 deployment is essential, especially as the proliferation of IoT devices could face severe address shortages without a widespread shift.

Reference: THN; originally sourced from FreeBuf (FreeBuf.COM).