Explore the future of IPv4 unicast extensions in this 26-minute conference talk from the Linux Plumbers Conference. Dive into the ongoing efforts to expand the usable IPv4 address space by reclaiming reserved, obsolete, and "future use" ranges. Learn about the challenges faced in IPv4 address scarcity, the rising costs of IPv4 addresses, and the slow adoption of IPv6. Discover the progress made in decontaminating previously unusable IP addresses through bug reporting, patch submissions, and collaboration with various vendors. Understand the potential impact of making hundreds of millions of additional IPv4 addresses available for global use. Gain insights into the planned experiments for routing these newly usable addresses and the steps being taken to update network infrastructures worldwide.