IPv4 Depletion

IPv4 is depleted. Now what?

By Richard Jimmerson, Chief Information Officer, ARIN

It has been more than three months since ARIN’s free pool of IPv4 address space depleted, and we have seen a few interesting trends in the registration operation since then.

1. The waiting list for unmet requests has grown to over 200 organizations and the relative rate of incoming IPv4 free pool requests has decreased.

Since 24 September 2015 when we issued the last IPv4 address block from the free pool inventory, we still have some IPv4 requests coming in and the waiting list for unmet requests continues to grow. At the time of writing this blog, there were 242 organizations on the waiting list for unmet requests and it is expected to continue slowly growing.

2. There has been a steady increase in IPv6 request traffic since the months leading up to IPv4 free pool depletion.

Leading up to the September announcement of IPv4 free pool depletion there was a short-lived spike in IPv6 requests. The IPv6 request traffic was certainly heavier in the last six months of 2015 when compared to the first half of the year. We expect the number of IPv6 requests to increase steadily in 2016. We are already noticing more IPv6 inquiries coming from end-user organizations and ISPs through our interactions with them in the Registration Services Department.

3. There has been a steady increase in the number of IPv4 transfer requests.

2015 ARIN IPv4 Transfers

As expected, we experienced an increase in the number of transfers to specified recipients following depletion of the IPv4 free pool. You can see the increase in the included graphic here, but what is not readily apparent is the ongoing work in the background that will yield an even sharper increase in transfer request traffic in the coming months. We are receiving a large number of transfer pre-approval and related requests that will later result in a formal transfer request.

To many of you who regularly read this blog, we expect none of this is a surprise. To others, however, this is new information and they will be looking for information and guidance on these registration-related topics in 2016.

To help keep the community informed on registration trends this year, we will focus several of our blog posts on IPv4 transfers and IPv6 registration-related topics. We will share information about trends we are seeing and provide pointers we believe could be helpful to you. For example, we’ve been receiving questions like these that we’ll be answering throughout the year:

  • What’s happening with the IPv4 waiting list?
  • What are the first steps I need to take if I want to receive IPv4 address space from a specified recipient transfer?
  • How often can I receive IPv4 address space from a specified recipient transfer?
  • How much IPv6 address space can my organization request?
  • As an ISP, what size IPv6 blocks should I assign to customers/end-sites?
  • How does IPv6 network planning differ from IPv4 network planning?

Let us know if you have any other specific questions you’d like to see us address, and keep your eyes peeled for future posts related to IPv4 transfers and IPv6.


ARIN Reaches IPv4 Depletion

By Richard Jimmerson, Chief Information Officer, ARIN

As indicated in the announcement issued today, ARIN’s IPv4 free pool has depleted. This is an important milestone for the Internet as we now usher in the age of IPv6.

ARIN IPv4 Address Pool Empty

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. They were given 30 days to decide if they would take the smaller block, or if they preferred to join the waiting list for unmet requests. In the case they chose not to accept the temporarily held /24, that block would go back into the inventory.

Even though we do not currently have an organization on the waiting list for unmet requests that will accept a block as small as a /24, we expect that to change after today’s depletion event. In the coming days we expect there will be organizations on the waiting list that will accept a /24.

Any /24s ARIN receives back into the inventory in the coming months as a result of an organization not accepting a temporarily held /24 would then be made available to organizations on the waiting list for unmet requests. Because of this activity, you will continue to see IPv4 address space issued to organizations by ARIN over the coming month even though we have reached depletion.

You will also see IPv4 address space issued to organizations on the waiting list over the next several months as ARIN receives small blocks of IPv4 address space resulting from a return or revocation of resources. We may also receive a distribution from the IANA twice a year in March or September, but a distribution is not guaranteed. ARIN’s most recent distribution from the IANA was received on 1 September 2015. This distribution included a /15 and two /16s that ARIN used to satisfy requests on the waiting list.

Aside from the expected IPv4 activity described above, ARIN will also continue issuing IPv4 addresses specifically reserved for the support of IPv6 transitions and Critical Internet Infrastructure, including Exchange Points. More information about those special use policies are described on the ARIN website. All other IPv4 registrations you see from ARIN will be the result of IPv4 transfers from this point forward. ARIN will continue satisfying IPv6 requests, as normal.

ARIN has reached depletion of the general IPv4 free pool today, 24 September 2015. We’ve been talking about the inevitability of IPv4 depletion for many years and have been educating the community about the need to get IPv6 resources and prepare public facing services for the IPv6 Internet, and now is the time to make sure you are taking steps toward preparing for IPv6 as soon as possible.


IPv4 Depletion Update

By Richard Jimmerson, Chief Information Officer, ARIN

IPv4 Depletion ARIN

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. In less than 24 hours after receiving this IPv4 address space from the IANA, ARIN used it to satisfy requests on the Waiting List for Unmet Requests. You can find more information about our actions in an announcement that was made on the same day of that fulfillment activity.

ARIN expects to receive their next distribution from the IANA in March of 2016 in the amount of approximately a /15. This IPv4 address space will be used to satisfy requests that still remain on the Waiting List for Unmet Requests.

For those of you paying close attention to the depletion of the ARIN IPv4 free pool, you may have noticed what appears to be a slow down in distribution of the final remaining /24s. In the last two months we issued (or placed on hold for qualifying organizations pending payment and agreement) more than 400 individual /24s. Many of these 400+ organizations elected to receive the /24 offered to them as ARIN’s largest remaining prefix size instead of being placed on the Waiting List for Unmet Requests. Others have elected to be placed on the waiting list for a larger block, asked for their ticket to be closed with no further action, or simply abandoned their request ticket, allowing the 30-day temporary hold period for the held /24 to expire.

In the cases described above where the organization did not elect to accept the /24 held for them, ARIN makes those /24s available in the inventory again. Our first action with a newly available /24, or any other sized block, is to apply it to the waiting list to determine if it will satisfy any waiting list tickets. Since no organization is currently on the waiting list for the size of a /24, it goes back into the inventory and then gets placed on hold for a newly qualified organization that is next in line for a response in the IPv4 request queue. Because of this “recycling” that is going on with the /24s previously in hold status, it has slowed down the depletion of the inventory count on our website for the final remaining /24s.

Even so, we expect the full depletion of these final remaining /24s in the coming weeks. ARIN will make a formal announcement and issue a press release when this happens.


Waiting List for Unmet IPv4 Requests

By Richard Jimmerson, Chief Information Officer, ARIN

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.

ARIN Waiting List Activated No Reason to Wait for IPv6

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.



On the Horizon: Unmet Requests Policy Activation

By Richard Jimmerson, Chief Information Officer, ARIN

On the Horizon

We expect to take registration actions this week that will activate ARIN’s policy for unmet requests. For the first time, it is expected an organization will receive a block size smaller than they qualified for, and/or an organization will be placed on the waiting list for unmet requests.

When an organization qualifies for a block size that no longer remains in the ARIN IPv4 inventory, they are given the option to either accept a smaller block that is available to fully satisfy their request, or to be placed on the waiting list for unmet requests. As we do with all IPv4 tickets, we take action on customer responses in the date/time stamp order that they were received. We are able to look ahead in our IPv4 response queue and see that we will take the registration actions described above during this business week.

Once we take the registration action of issuing a smaller block than what was qualified for, or place an organization on the waiting list for unmet requests, we will issue an announcement to the community and a press release.

At the time of this post, there is less than 1% of a /8 equivalent remaining in the ARIN IPv4 free pool. The only prefix sizes remaining are /23s and /24s.


Breaking down ARIN’s remaining IPv4 Pool

By Richard Jimmerson, Chief Information Officer, ARIN

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. Given the limited amount of address space remaining in the ARIN IPv4 inventory, a common question has been about the concept of “breaking blocks”, so let me explain why and how it works.

IPv4 Review Team

When an organization qualifies for a block size that is not available in the ARIN IPv4 inventory, but there is a larger block size available, we split the closest available larger block to create the newly qualified/approved block size for that organization. For instance, if an organization qualifies for a /14, but it is not available in the inventory, ARIN will split the next available, larger block to create the block that is needed to fulfill that request. In this case, for example, the next larger block is a /11, which would be split to fulfill that approved /14 request. The blocks remaining after that split, a /12, /13, and a /14, would remain in the ARIN IPv4 free pool inventory and be displayed accordingly.

We have hundreds of open IPv4 requests at ARIN today. We are very carefully reviewing and responding to tickets in the order they were received and in accordance with Phase 4 of our IPv4 Countdown Plan. We are aware that this has created delays in our response times, as the request volume and customer questions we are receiving have significantly increased our workload. Rest assured that we are working diligently, and that our number one priority is ensuring Phase 4 procedures are followed during this unique time in the IPv4 history.

The number of days remaining before depletion are dwindling. It is very likely that we are already processing a request that we will be unable to fulfill. We will manage the distribution of the remaining IPv4 in accordance with policy and by following the procedures we outlined in 2011 as part of the IPv4 Countdown Plan.

As a community, we have been preparing for this milestone for years, and now that it is here the Registration Services team is fully committed to making sure that we exercise full diligence with each IPv4 request. As anticipated, this has slowed our request processing pace, and we appreciate the patience of all our customers at this time.



IPv4 Request Pipeline

By Richard Jimmerson, Chief Information Officer, ARIN

IPv4 pipeline

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.

IPv4 inventory 5.7.2015It is possible in the coming weeks we will have enough IPv4 address space requests in the pipeline to account for all the remaining IPv4 address space in the ARIN IPv4 free pool. Because of this, the first organization to elect to be placed on the waiting list for unmet resources may already have an open request for IPv4 address space today.

We are working hard to reduce the response times for IPv4 requests, but are at the same time being very precise about the order in which we review and respond to tickets. Strict adherence to our Phase 4 countdown procedures is more important than ever as we near the end of our IPv4 free pool. It is imperative that we review and respond to all tickets in the order they were received according to their timestamp.

When the first organization elects to be placed on the Waiting List for Unmet Requests, we will let you know. We will send an announcement out via our arin-announce mailing list, update you with another blog in this series, share it on social media, and issue a press release to notify the media about this milestone. We can’t predict exactly when this will happen, but we expect it to be soon. This will be a signal that full depletion of the ARIN IPv4 free pool is imminent.

Of course, organizations have options to obtain IPv4 address space through the transfer process and to request IPv6 address space from ARIN. We will share more information about the status of the ARIN IPv4 inventory in the coming weeks.


Defining Depletion: IPv4 Address Availability in the ARIN Region

By Richard Jimmerson, Chief Information Officer, ARIN

Here at ARIN we have been actively discussing the depletion of the IPv4 free pool for many years. Our goal has been to prepare the Internet community for the day when we can no longer issue IPv4 address space to those who need it. As that day approaches, there has been increased interest in how IPv4 addresses are issued and what the options are after we reach depletion. To help provide more insight into the status of IPv4 at ARIN, this will be the first of a blog series to keep you informed about IPv4 depletion and the current status of IP addresses remaining in our free pool.

IPv4 Depletion is Real

One of the major milestones of IPv4 depletion was in February 2011 when the Internet Assigned Numbers Authority (IANA) issued their final /8 blocks to each of the Regional Internet Registries (RIRs). Working with our final /8 blocks, each of the RIRs were well into establishing their respective countdown to depletion procedures.

In the ARIN region, a four-phase countdown plan was created that described how ARIN would distribute its remaining IPv4 address blocks. Today we are in the 4th and final phase of that countdown plan.

Remaining IPv4 Inventory 18 March 2015We have also been publishing information on a regular basis about the remaining IPv4 free pool inventory at ARIN. As of today, our IPv4 inventory stands at .31 of a /8. We also publish the number of discrete block sizes that remain in the inventory. This information is available and updated daily at our IPv4 depletion information page. In addition to the inventory, you can also find information about the various options to obtain IPv4 address space through ARIN policies as the ARIN IPv4 free pool depletes.

Defining Depletion

Depletion means different things in different parts of the world. In some of the other Regional Internet Registries, depletion has been associated with the triggering of “final” IPv4 regional number resource policy when the RIR dug into it’s last /8 of inventory. For ARIN no such policy existed, but we have already been issuing from our last /8 for almost a year now. ARIN’s current IPv4 inventory no longer includes /8s, /9s, or /10s, so depletion of these size blocks has already occurred.

Within the ARIN region, depletion status varies depending on the needs of an organization. For some larger organizations in the ARIN region, their IPv4 address space needs going forward may exceed the amount they can obtain from ARIN’s remaining inventory, i.e., depletion has effectively already occurred for these organizations. For others, depletion will soon become a reality.

We expect to receive requests in the coming months that qualify for IPv4 block sizes that are no longer available in ARIN’s inventory. In these cases, organizations may elect to be placed on a waiting list for their qualified block size, or elect to receive a smaller block size that is still available in the ARIN inventory. Organizations may also obtain IPv4 address space through a transfer from another organization. More information about these options are available at our IPv4 depletion page.

As ARIN gets closer to IPv4 free pool depletion in the coming months, we will provide additional updates. If you have ideas for topics or questions that you’d like us to address in this blog series, please let us know in the comments below or on social media.


IPv4 Depletion Status at ARIN

By Leslie Nobile, Director of Registration Services, ARIN

What happens after ARIN depletes its free pool of IPv4 address space?  Will there be a Phase 5 added to the IPv4 Countdown Plan? Is the IPv4 inventory counter always accurate?  These are just some of the questions we’ve been hearing in recent weeks. We understand that IPv4 depletion is causing confusion and uncertainty, so we’d like to try address some of these common questions and provide some additional information on the current status of IPv4 address space at ARIN.

Update on the IPv4 Countdown Plan

ARIN moved into the final stage (Phase 4) of its documented IPv4 Countdown Plan in April 2014. ARIN’s IPv4 countdown plan was designed to have only 4 stages, which means that we will continue working in Phase 4 as we move toward full depletion of ARIN’s available IPv4 inventory.  ARIN will not be adding a Phase 5 but will continue in Phase 4 when IPv4 needs will be met through IPv4 address transfers and the IPv4 waiting list.

You can find more detail on the Countdown Plan on our website and in some earlier blog posts (dated April and October 2014). In Phase 4, all IPv4 requests are processed in the order they are received and are team-reviewed by ARIN’s resource analysts. While team review has slowed down overall processing times, we are working diligently to streamline the process and maintain our standard two-day response time on all IPv4 request tickets.

Although you might have expected to see a rapid increase in IPv4 requests, or a “run on the bank” once we hit our last /8, IPv4 resource traffic has actually remained fairly steady since that time.  We did see a slight increase in April 2014 after we announced that we had reached Phase 4 of the Countdown Plan, but other than that, things have been fairly consistent.

2014 Requests for IPv4 Address Space

2014 Delegation Issued by ARIN

The IPv4 Counter

The IPv4 inventory counter displayed on ARIN’s homepage (see it on the bottom right at www.arin.net), was designed to provide the community with a daily snapshot of how much IPv4 address space ARIN has left in its available pool. The counter shows the total number of /8 equivalents remaining in ARIN’s available IPv4 inventory as well as a list of the total number of prefixes available of any given size.  “Available space” includes our current IPv4 inventory minus any returned, reclaimed, or revoked address blocks that may be in a hold status.  Hold status is a term that describes address space held by ARIN until it clears any filters before being released back into ARIN’s IPv4 free pool. The “Available space” as reflected in the IPv4 counter fluctuates regularly based on new allocations and assignments being issued, and incoming address space being taken off its hold status.

ARIN IPv4 Counter 2.6.15

If you use our daily ARIN-issued mailing list to help you keep track of how much IPv4 address remains in ARIN’s inventory, you will find that it does not match the IPv4 inventory counter on our homepage. In fact, you will likely find several discrepancies between the ARIN-issued report and the IPv4 inventory counter.

The ARIN-issued mailing list provides a daily report of IPv4 and IPv6 address space returned to ARIN’s available inventory and IPv4 and IPv6 address space issued directly by ARIN to its customers. The data reported in the ARIN-issued report also includes IPv4 address space issued via 8.3 transfer which is NOT included in the IPv4 counter.  Additionally, once ARIN approves an IPv4 address block, it is immediately removed from the available inventory and placed on hold until registration fees have been paid and a Registration Services Agreement has been signed.  These resources will not show up in the available inventory, nor will they show up on the ARIN-issued report until all administrative tasks have been completed.

As we watch the IPv4 counter continue to drop, ARIN will strive to keep things running as smoothly as possible.  IPv4 depletion comes as no surprise, and as we reach these final stages, we will continue to conduct “business as usual” and provide our customers with the best possible service we can. And in the face of ultimate IPv4 depletion, we will continue to encourage all ARIN customers to get their IPv6 address space to ensure the future growth of their networks. There is plenty for everyone!


Current Status of Phase 4 of the IPv4 Countdown Plan

By Leslie Nobile, Director of Registration Services, ARIN

ARIN Team Review in Progress

ARIN has implemented Phase 4 of our IPv4 Countdown Plan, and as a result, our response time for IPv4 requests has increased from our organizational goal of two business days. We acknowledge that this situation has caused some frustration in the community, and we are making adjustments to our IPv4 request procedures in an effort to improve response time.

But the first question is what changed in Phase 4, and why?

First – Phase 4 requires “team review” for all IPv4 requests. This allows us to ensure all organizations are being reviewed under the same set of requirements. By having at least two analysts review each new IPv4 request (and responses to existing IPv4 requests), we have additional verification that each is handled in accordance with policy.

Second – Phase 4 also requires processing of all new IPv4 requests (and responses to existing IPv4 requests) in the order in which they were received. Because multiple organizations will be vying for the limited number of available IPv4 prefixes, we want to make sure our processes are fair and equitable, and that organizations with valid and documented requests receive sequential access to IPv4 free pool resources.

How does team review work?

  • Our team review process involves four analysts.
  • Three analysts are assigned to review approximately 30 tickets per day, starting with the oldest tickets first. These analysts conduct a preliminary review of each and record their conclusions, action items, and any other necessary information.
  • One senior analyst is dedicated to reviewing all of these initial assessments and providing a response to the customer in the order received.
  • Because the prep work has already been done by the three analysts who are conducting preliminary reviews, this analyst can typically respond very quickly throughout the day, which helps to ensure requests are processed as quickly as possible.

What changes have been made to help improve response time?

First, all IPv4 requests that have provided everything necessary for an approval (including officer attestation) will be processed in the order they were received independent of in-progress IPv4 requests. This is expected to cut the overall time required to complete an IPv4 request by several business days.

Second, we’ve removed all requests that would be filled from a reserved block (micro-allocations, IPv6-transition blocks) as well as /24 requests from the IPv4 team review queue.   Because requests filled from a reserve don’t come from our general-use inventory, there’s no need to team review them until we near depletion of those reserved blocks.

We hope these temporary changes will improve our response time and allow us to quickly get back to our two-business day turnaround on IPv4 requests.


5 Misperceptions about ARIN IPv4 Depletion

Leslie NobileBy Leslie Nobile, Director of Registration Services, ARIN

Last week, ARIN’s available IPv4 inventory hit the 1 /8 mark, kicking off the final phase of our IPv4 Countdown plan.  Since we made that announcement, we’ve seen some online buzz on news sites like: CNET, Network World, ZDNet, Enterprise Networking Planet, across blogs, forums, and social media.

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 misconceptions, and provide some facts to help you better understand the situation.

1. ARIN has run out of IPv4 address space 

Close, but not quite.  ARIN’s IPv4 inventory has reached a new low,  but we’re not out yet. ARIN’s available IPv4 inventory is published daily on our home page at www.arin.net. If you click on the Countdown plan, you can see a break out of the remaining IPv4 block sizes. The totals on the Countdown page don’t include space that has been reserved for specific purposes designated by policy, including the /10 of IPv4 space set aside to help facilitate IPv6 deployment and the /16 that has been set aside for micro-allocations.  Additionally, any space that is returned or revoked is held for a period of 60 days, so that space will not show up in the available inventory either.

2. ISPs and End-users can’t get IPv4 address space from ARIN anymore

Not true. ARIN is still assigning and allocating IPv4 space in accordance with policy, just like we have always done.  However, in the near future, it is quite probable that an organization may not be able to get the address block size they qualify for from ARIN, at which point they may choose to accept the largest block size available or be added to a waiting list for unmet requests. 

3. ARIN policy changed after reaching the final /8

False. Unlike some of the other Regional Internet Registries (RIRs), the ARIN community did not develop a policy that kicked in when our inventory dropped below a /8. ARIN’s current inventory will continue to be distributed using the same policies that we have been following.  The major change implemented in Phase Four is the method in which IPv4 requests are reviewed and processed.

4.  ARIN treats small ISPs differently than they treat large ISPs

Absolutely untrue.   ARIN strictly adheres to its mandate to treat all requestors in a fair and equitable manner in accordance with the community developed policies documented in the Number Resource Policy Manual.  We work hard to ensure that all organizations can obtain the amount of IP address space that they can justify under the current set of policies.

5. IPv4 shortage isn’t a good enough reason to prepare for IPv6

IPv4 depletion is THE reason to make sure you have a plan to deploy IPv6.  Solutions that people have suggested to extend the life of IPv4 (think NAT, reclaiming unused IPv4 space, a transfer market, etc.) are only temporary solutions that will not suffice for the long term. IPv4 address space is simply not large enough in its entirety to meet the addressing needs of the global Internet. IPv6 implementation is the only viable solution to the dwindling pool of available IPv4 space.


ARIN Reaches Final /8 of IPv4 Address Space

By Leslie Nobile, Director of Registration Services, ARIN

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.  ARIN has been issuing IPv6 address space since 1999 and has been active in educating the community on the importance of IPv6 adoption for many years. For most ISPs who have IPv4 address space directly from ARIN, there will be no additional initial registration fees to obtain an IPv6 address block from ARIN.  End-users who obtain IPv6 address space from ARIN will pay an initial registration fee, and then a small annual maintenance fee of $100.  Take a look at the ARIN fee schedule to learn more about registration fees.

The bottom line is that ARIN has plenty of IPv6 address space for everyone who needs it and we are happy to help you obtain your own block, so please come see us!


ARIN Your Voice Your Community


Can an organization still get IPv4 address space from ARIN moving forward?

Phase 4 of the IPv4 Countdown Plan lays out the steps for how all IPv4 address space requests will be processed going forward.  Every request will be handled in the order it is received, and reviewed by our team of resource analysts. We have been tweaking our processes and procedures in preparation for this final phase of IPv4 depletion since we implemented Phase 1 of the countdown plan in February 2011, so we are ready for the changes that Phase 4 will bring.  However, we do need to state up front that our response times may be impacted by the more complex review process.

If we no longer have the IPv4 block size that an organization qualifies for in our available inventory, they will be offered the choice to either accept the largest available block size they can justify under policy, or be added to the Waiting List for Unmet Requests in the hopes that a larger block will become available at some point in the future

ARIN’s Remaining IPv4 inventory is detailed on our Countdown Page, including the number of available blocks according to prefix size, ranging from /24 to /9.

If you have any questions about how to obtain IPv4 address space in Phase 4, or how to request IPv6 address space, please feel free to give our Help Desk a call at +1.703.227.0660 or email us at hostmaster@arin.net.