ARIN IPv4 Free Pool Reaches Zero [arin.net]

On 24 September 2015, ARIN issued the final IPv4 addresses in its free pool. ARIN will continue to process and approve requests for IPv4 address blocks. Those approved requests may be fulfilled via the Wait List for Unmet IPv4 Requests, or through the IPv4 Transfer Market.

North America Just Ran Out of Old-School Internet Addresses [wired.com]

That won’t affect normal Internet users, but it will put more pressure on Internet service providers, software companies, and large organizations to accelerate their migration to IPv4’s successor, IPv6.

Yes, this news may sound familiar. WIRED reported back in 2011 that the Internet had run out of IP addresses, or more specifically, that an organization called Internet Assigned Numbers Authority (IANA) had run out of IPv4 addresses. Basically, IANA hands out blocks of IP addresses to regional organizations like ARIN and its counterparts around the world. So even after IANA ran out, many IPv4 addressees were still available. But now the regional organizations are running out, as well.