The day has finally arrived.
— ARIN (@TeamARIN) September 24, 2015
ARIN announced today that their free pool has reached zero. Unlike all of the other declared exhaustions, this actually means that there are no IPv4 addresses at all left in the ARIN region, covering the North Americas.
ARIN’s press release can be found here. Note that this is potentially not the end for waiting list users, as it is possible IANA may make further redistributions of returned addresses every few months or so, but these are likely to be immediately gobbled up by the waiting list applicants.