The total number of IPv4 addresses possible are 4228250625 and if the reports are to be believed than this stock will be getting finished very soon.
According to Axel Pawlik who is presently the managing director of RIPE (responsible for distributing IPv4 addresses in Europe) believes that IPv4 stock will be finished by September, 2011. He had also said that most of requests for IP’s are generating in ASIA and US. The only solution according to him is the upcoming Internet Protocol version 6 (IPv6).