As described in an announcement on 1 July 2015, ARIN has activated the Unmet Requests Policy. Organizations are currently electing to accept block sizes smaller than those for which they qualified or are electing to be placed on the Waiting List for Unmet Requests. So far, 21 organizations have elected to be placed on the waiting list and ARIN expects there to be over 100 soon.
At the time of this post, ARIN holds only /24 blocks in the ARIN IPv4 free pool inventory. We expect the ARIN IPv4 free pool inventory to deplete in full sometime around the late August timeframe. Options for obtaining IPv4 address space other than through the ARIN IPv4 free pool, including transfers, are described on our IPv4 inventory page.
Starting in late August, we will publish the Waiting List for Unmet Requests on the ARIN public website. The information will be displayed on a dedicated page for the waiting list and will include the full waiting list order based on date/timestamp placement, qualified block sizes, and minimum acceptable block sizes. We will also include summary totals for all information displayed. ARIN is unable to publicly disclose the names of the organizations on the waiting list, so that information will not be included.
I want to note that the community will continue to see IPv4 blocks larger than what remains in the inventory issued from ARIN over the next 60 days. The reason for this is that when an organization is approved for IPv4 address space, they are granted an approval that is valid for 60 days. At the time of approval, the approved block size is placed on a 60-day temporary hold for the organization. Inside this 60-day period, the organization pays any applicable registration fees due and signs a Registration Services Agreement (RSA), if an updated one is not already on file. After this has all been done, the organization is issued the block that was held for them.
If you see a block being issued by ARIN that is larger than what remains in the IPv4 inventory, it is for approvals that were granted up to two months ago.