172.0.0.0/12 has been Allocated

Thu Aug 23 15:26:24 UTC 2012

IMO the justifcation is probably in other areas of their business like cloud services, data center, etc. 

Obvisouly, it was compelling enough to warrant ARIN's approval for allocation of the space in the last stretch of IPv4. All /16 and larger requests goes to IPv4 review team anyway. 
So, again I bet it was almost all cloud/data center stuff. Unless they are launching some new kind of service or it's a market specific allocation.

Judging from the ARIN IPv4 Space Available counter actually looks like ARIN might in Phase 2 now of the countdown but I am not sure.

Otis
-----Original Message-----
From: Blake Hudson [mailto:blake at ispn.net] 
Sent: Thursday, August 23, 2012 9:04 AM
To: nanog at nanog.org
Subject: Re: 172.0.0.0/12 has been Allocated

I wonder if ATT will be returning some of those /16 and /15 allocations it has in return for the /12 - http://whois.arin.net/rest/org/SIS-80/nets

How does one suddenly justify needing 1,000,000 more IP addresses (explosive expected growth in the next couple months?)

--Blake

Owen DeLong wrote the following on 8/23/2012 1:29 AM:
> AT&T should just be glad there was a /12 for them to get.
>
> That isn't going to be true for much longer.
>
> If you are counting on an IPv4 free pool to run your business next year, you are making a bad bet.
>
> Owen
>
> On Aug 22, 2012, at 22:54 , "Otis L. Surratt, Jr." <otis at ocosa.com> wrote:
>
>> My apologies again, I saw it as 127.0.0.0. and not 172.0.0.0.
>>
>> I've been working long hours last couple nights. Yeah you are probably right, since they to pulled that one very close to RFC1918.
>>
>> http://bgp.potaroo.net/ipv4-stats/allocated-arin.html
>>
>>
>> I would hate to be AT&T for this IP allocation. Heck, I would simple push more IPv6 if I were them.
>>
>>
>>
>> -----Original Message-----
>> From: Dan White [mailto:dwhite at olp.net]
>> Sent: Thursday, August 23, 2012 12:37 AM
>> To: Otis L. Surratt, Jr.
>> Cc: nanog at nanog.org
>> Subject: Re: 172.0.0.0/12 has been Allocated
>>
>> You can do a whois search at arin.net to see the allocation.
>>
>> 172.0.0.0/12 is often confused with the private 172.16.0.0/12 address 
>> space, which I would consider a 'scraping the bottom of the barrel'
>> allocation.
>>
>> I also noticed a couple of subnets in that range showing up in the 
>> weekly Cidr reports, beginning in July.
>>
>> On 08/23/12 00:29 -0500, Otis L. Surratt, Jr. wrote:
>>> Dan,
>>>
>>> Can you provide a link to support this?
>>> If this is true, I wonder how this will work.
>>>
>>> Otis
>>> -----Original Message-----
>>> From: Dan White [mailto:dwhite at olp.net]
>>> Sent: Thursday, August 23, 2012 12:24 AM
>>> To: nanog at nanog.org
>>> Subject: 172.0.0.0/12 has been Allocated
>>>
>>> 172.0.0.0-172.15.255.255 was allocated on 2012-08-20 to AT&T 
>>> Internet Services.
>> --
>> Dan White
>