We have performed a light-weight source code scan on 145 recently developed software systems to determine whether they contain hard-coded dependencies on version 4 of the Internet Protocol (IPv4). We compared our results with a similar scan that we performed in 2010.

       
The IPv4 Internet addresses that are currently being assigned to computers on the Inter-net is bound to run out in a couple of years. When switching to the next version (IPv6), more addresses will become available, but systems with hard-coded dependencies are then at risk of malfunctioning.

We found that IPv4 dependencies are present in the source code of one in every 7 applications (15%), up from 1 in 12 applications (8%) in 2010.

The report can be downloaded here:
Trend Report on IPv4 Captivity 2011 (PDF - 286 Kb)

Read the press release:
Software unprepared for IPv6