- AMA with John Curran, President & CEO of the American Registry for Internet Numbers (ARIN) - Live now in r/IAMA. Encouraging all Internet stakeholders to prepare for IPv6 as we run out of IPv4 addresses in coming weeks - currently 0.00284 of IPv4 addresses remaining. https://www.reddit.com/r/iama/comments/3gqovv/i_am_john_curran_president_and_ceo_of_the/ 5 comments technology