<div dir="ltr">Thanks, John.<div><br></div><div>It sounds to me like ARIN is already doing the right thing (saving 2-byte ASNs for people who specifically want them), and that is sufficient for the time being. It does not appear that additional restrictions on who may request a 2-byte ASN are necessary at this time. If at some point 5+ years down the road the rate of 2-byte ASN demand starts to exceed the recovered supply and the 2-byte ASN inventory is depleted, we can consider a waiting list and/or technical requirements for requesting a 2-byte ASN at that time.</div><div><br></div><div>Is there any other reason we need to consider taking action sooner? Was there something else I'm missing that prompted ARIN staff to start the consultation process around a 2-byte ASN waiting list?</div><div><br></div><div>-Scott</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Apr 7, 2016 at 11:44 AM, John Curran <span dir="ltr"><<a href="mailto:jcurran@arin.net" target="_blank">jcurran@arin.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Folks -<br>
<br>
Please forgive this omnibus email of information, but we've had sufficient individual<br>
questions for 2-byte ASN data that it simply made more sense to provide one full<br>
summary rather than reply to each question individually...<br>
<br>
ARIN continues to have classic, 2-byte, AS numbers in inventory. Over the last few<br>
years, we have received small blocks of them in our new delegations from the IANA,<br>
obtained them from customer returns of AS numbers, or through revocations of AS<br>
numbers due to non-payment of registration fees.<br>
<br>
Our last AS block delegation from IANA was on 29 April 2015. We received 99 2-byte<br>
ASNs and 925 4-byte ASNs at that time, and do not expect to receive any additional<br>
2-byte ASNs from the IANA in future delegations. The 2-byte ASNs received from the<br>
IANA in 2015 were added to the inventory and placed on hold. The reason that the<br>
2-byte ASNs were put on hold is that was not responsible to issue from the dwindling<br>
quantity of these resources to parties that did not specifically request such while we<br>
were still receiving AS number requests specifically asking for 2-byte AS numbers.<br>
<br>
As of today, we currently have the following 2-byte ASNs in ARIN inventory:<br>
<br>
387 2-byte AS numbers on hold (most were routed at some point)<br>
535 2-byte AS numbers revoked<br>
133 2-byte AS numbers returned<br>
<br>
= 1,055 2-byte AS numbers returned/revoked/held (Total)<br>
<br>
Customers requesting ASNs receive a 4-byte ASN by default. If a request comes in<br>
that specifically requests a 2-byte ASN, we inform the customer that we have noted<br>
their special request and that we will accommodate it at the issuance phase of the<br>
ticket process if we have 2-byte ASN available at that time.<br>
<br>
Rate of issuance for 2-byte ASNs per month -<br>
<br>
1/2015: 68<br>
2/2015: 77<br>
3/2015: 74<br>
4/2015: 60<br>
5/2015: 7<br>
6/2015: 12<br>
7/2015: 16<br>
8/2015: 4<br>
9/2015: 7<br>
10/2015: 11<br>
11/2015: 7<br>
12/2015: 11<br>
1/2016: 5<br>
2/2016: 6<br>
3/2016: 13<br>
<br>
A waiting list will only be applicable after depletion of the present 2-byte ASN inventory,<br>
hence the following general run-out estimates are provided for consideration:<br>
<br>
- If we release all of the 2-byte ASNs from hold and issue ASNs strictly from smallest<br>
to largest, i.e. the practice prior to May 2015, it is likely that the current inventory of<br>
2-byte ASN’s would last somewhere between 6 to 12 months.<br>
<br>
- If we continue the current approach (wherein 4-byte ASNs are issued by default and<br>
2-byte ASNs are only issued upon special request), the current inventory of 2-byte<br>
ASNs would appear to last for many years (5+ years at present rate).<br>
<br>
I hope the above information helps in your policy development efforts!<br>
<br>
Thank you,<br>
/John<br>
<br>
John Curran<br>
President and CEO<br>
American Registry for Internet Numbers (ARIN)<br>
<br>
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