IPv4

ARIN Reaches IPv4 Depletion

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ARIN’s IPv4 free pool has depleted. This is an important milestone for the Internet as now we now usher in the age of IPv6. As previously described in this blog series, ARIN has been placing /24s on hold for organizations over the past few months. This occurred when an organization qualified for a larger block size, but was given the option to accept our only available block size (/24) available at the time.

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IPv4 Depletion Update

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Earlier this week ARIN and the other RIRs received a distribution of IPv4 address space from the IANA in accordance with their Global Policy for Post Exhaustion IPv4 Allocation Mechanisms. ARIN was issued a total of a /14 worth of IPv4 address space composed of one /15 block and two /16 blocks.

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Tag This: IPv4 Runout

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With less than 45K IPv4 addresses remaining in the ARIN inventory, IPv4 depletion here at ARIN is only weeks away. We thought it’d be fun to get your ideas about the tag line we should use when ARIN hits IPv4 runout. Maybe we’ll even take you up on a few of these. Here’s what you came up with so far

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Waiting List for Unmet IPv4 Requests

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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.

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Breaking down ARIN’s remaining IPv4 Pool

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At the time of this post, there is only .15 of a /8 remaining in the ARIN IPv4 free pool. The largest prefix that remains available is a /11. Within days, that /11 will either be issued to a qualifying organization, or broken down to make smaller prefixes available for organizations who have qualified for a block size that falls between a /11 and the next available block size in inventory.

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IPv4 Request Pipeline

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Today we have .20 of a /8 remaining in the ARIN IPv4 free pool. At the same time, we have over 200 open tickets from organizations requesting IPv4 address space from that free pool. These requests are for sizes ranging from a /23 to larger than a /16. This does not count the many open tickets we have for /24s.

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5 Misperceptions about ARIN IPv4 Depletion

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There has been some animated discussion and speculation about ARIN’s IPv4 depletion, in various places ranging from forum discussions to Twitter haikus. In much of the discussion about this news, we did find a few persistent misconceptions. So we thought we would take the opportunity to clear up a few of these, and provide some facts to help you better understand the situation.

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ARIN Reaches Final /8 of IPv4 Address Space

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On 23 April 2014, ARIN’s IPv4 address inventory dropped to 1.00 /8 (the equivalent of 16,777,216 addresses) which triggered the final phase of our IPv4 Countdown Plan. Read the official ARIN announcement on this milestone. What is the answer to IPv4 depletion? IPv4 depletion should come as no surprise to anyone and clearly underscores the need for IPv6. The sheer size of the IPv6 address pool will more than meet the needs of the growing Internet now, and well into the future.

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