A Pragmatic Report on IPv4 Address Space Consumption by Tony Hain, Cisco Systems

When I interact with people from all around the world discussing IPv6, there continue to be questions about the projected lifetime for IPv4. This article presents consumption rate and lifetime projections based on publicly available Internet Assigned Numbers Authority (IANA) data. In addition, there is discussion about why the widely quoted alternative projection may be flawed, thus leading everyone to believe we have much more time than we might.