The vast majority of Iranian ISPs' international transit connectivity is
through AS12880 DCI , which is a government run telecom authority. Google
"AS12880 DCI Iran" for more info. DCI is also responsible for layer 2
transport and DWDM services for smaller downstream ISPs, on other
international terrestrial fiber links, which are opaque to us NANOG list
people from the perspective of global v4/v6 routing table/prefix
announcement analysis.

On Mon, Nov 18, 2019 at 7:10 AM Sean Donelan <s...@donelan.com> wrote:

>
> Its very practical for a country to cut 95%+ of its Internet connectivity.
> Its not a complete cut-off, there is some limited connectivity. But for
> most ordinary individuals, their communication channels are cut-off.
>
> https://twitter.com/netblocks/status/1196366347938271232
>

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