Suspecious anycast prefixes

Yaoqing(Joey) Liu joey.liuyq at gmail.com
Wed May 4 15:11:18 CDT 2011


Thanks for clarifying this, actually I have a few more blocks with four
origin ASNs that I'm not positive if they are anycast prefixes. Please help
distinguish them if the provide anycast service.

27.130.0.0/16

58.147.0.0/20
58.147.0.0/17
58.147.16.0/20
58.147.64.0/20
58.147.80.0/20
58.147.96.0/20
58.147.112.0/20

61.237.224.0/20
65.61.188.0/24
69.20.95.0/24

110.164.0.0/16
110.164.48.0/20
110.164.64.0/20
110.164.80.0/20
110.164.176.0/20

112.142.0.0/16
112.143.0.0/16

180.183.0.0/16

198.32.64.0/24
198.32.136.0/24
198.32.175.0/24

202.69.136.0/21
202.99.58.0/24
202.122.116.0/24

203.119.30.0/24
204.79.195.0/24
204.79.197.0/24
206.51.38.0/24
206.223.116.0/24
207.231.241.0/24
208.67.239.0/24

222.35.0.0/18
222.35.248.0/21
222.123.0.0/16
223.204.0.0/16
223.205.0.0/16

Yaoqing

On Mon, May 2, 2011 at 11:20 PM, <bmanning at vacation.karoshi.com> wrote:

> On Mon, May 02, 2011 at 08:40:01PM -0400, Christopher Morrow wrote:
> > On Mon, May 2, 2011 at 3:35 PM, Joe Abley <jabley at hopcount.ca> wrote:
> > >
> > > On 2011-05-02, at 21:16, Yaoqing(Joey) Liu wrote:
> > >
> > >> I found the following prefixes are often originated by many ASNs more
> than
> > >> five, wonder if they provide global anycast service, if so what
> specific
> > >> service they provide?
> > >>
> > >> 12.64.255.0/24
> > >
> > > CERNET.
> > >
> > >> <http://70.37.135.0/24>70.37.135.0/24
> > >
> > > Microsoft/Hotmail.
> > >
> > >> 198.32.176.0/24
> > >
> > > Yahoo!
> >
> > as a note, this is bmanning/ep.net exchange space, no? so this could
> > be just people leaking this into their table/global-table by mistake?
>
>
>         used to be.  ep.net has fragmented into little bits.  most of the
> prefixes have
>        been transfered to the clients who were using them, the ones who are
> still around
>        are outside the ARIN region and there is no clean way to move them
> given ARIN and
>        other RIR policy.
>
> This particular prefix was used as a public exchange, operated by Switch &
> Data. Not sure
> what they have done w/ it since then.
>
> Switch and Data Management Company LLC NET-PAIX-V4 (NET-198-32-175-0-1)
> 198.32.175.0 - 198.32.177.255
> EP.NET, LLC. NET-EP-176 (NET-198-32-176-0-1) 198.32.176.0 - 198.32.176.255
>
>
> /bill
>
>



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