This now means that IANA has effectively run out of addresses, and once each region is out, there are no more. IANA distributed the last blocks/groups of IPv4 addresses, one block of /8 addresses, to each region on Feb 3, 2011. Within IANA, there are five regions around the world (known as RIRs), each providing IP addresses for devices within that region. IANA has announced that available IPv4 addresses, the ones we are most familiar with today with four groups of numbers, has come to an end. The Internet Assigned Numbers Authority ( IANA) is the entity responsible for handing out IP addresses for the Internet.
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