Providing transit to unallocated networks

Tom Beecher beecher at
Wed Sep 28 00:37:40 UTC 2016

I've seen this with increasing frequency in the last 8-12 months, more with
ASNs that were either expired/unallocated. Spammers seem to be snatching
them up and hijacking IPs via bilateral peering to make it harder to

I've found it very difficult in some cases to get traction from IXes or
transit providers to take action though. It makes sense ; they both have a
financial interest in selling the ports and the pipes.

In two cases this year, it took the threat of name and shame to get action
taken, so it's a useful tool for sure.

On Tue, Sep 27, 2016 at 8:18 PM, Alistair Mackenzie <magicsata at>

> Hi,
> I've come across a network which seem to be getting transit yet both the
> ASN and IP space is not allocated by the RIR. It does appear at some point
> that it was valid however this is no longer the case.
> The network is single homed and I tried asking the transit provider what
> their policy was on this but got no answer.
> Has anyone seen anything like this? What has happened in the past with
> things like this?
> Thanks,
> Alistair

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