Blackhole route advertisements by AS14037 of our IP space - please filter them out at your end

Suresh Ramasubramanian ops.lists at
Thu Nov 20 05:19:27 UTC 2008


Yes we are on the phone with xo - but meanwhile several other
operators have been picking it up.

As for operational impact - we're - thats, hosted domains etc, email for 40 million users or so.
That makes us, lemme see, quite a bit larger than people like Comcast,
in terms of userbase for email.

I hope that helps the community decide whether or not to accept these
bogus blackhole prefixes


On Thu, Nov 20, 2008 at 10:41 AM, kris foster <kris.foster at> wrote:
> On Nov 19, 2008, at 8:43 PM, Suresh Ramasubramanian wrote:
>> If you see being announced from any other prefix than
>> XO (2828 I guess) please ignore it.  Especially if you see it
>> announced from 19318 or 14037.
> You're unlikely to get any reasonable response or action here. The best
> course of action is to work through XO. You are their customer, and it is
> their address space, right?
> For what it's worth was advertised recently but as a
> community we have no way of knowing the validity of it, or the operational
> impact.
> Kris
> (not speaking as MLC)

Suresh Ramasubramanian (ops.lists at

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