Routing issues to AWS environment.

John Von Essen john at
Wed May 8 20:54:36 UTC 2019

I was just about to email the group for a related issue.

We are also seeing some funky routing/peering within the AWS network.

We primarily communicate with Verizon Media/Oath - AS10310. Verizon Media has a presence in Singapore, and its peered locally with AWS AS38895 - we normally see 8ms latency. Verizon Media also peers with AWS AS16509 in Japan, but for Singapore traffic, Verizon Media sends a lower MED so AWS Singapore should prefer that route/peer, but its not working properly on the AWS side, all of our traffic is going to Japan, this started early AM today.

I had Verizon Media investigate, and we gave them our AWS Singapore IP addresses, they confirmed that they are not receiving those prefixes/announcements from AWS Singapore (AS38895).

So something is broke…. hopefully if someone from AWS is reading they can escalate.

In my case, the AWS Singapore IP ranges in question are : and


> On May 8, 2019, at 10:55 AM, Curt Rice <crice at> wrote:
> Hi are there any AWS engineers out there? We are seeing routing problems between NTT and AWS in Ashburn, Va and would like to find out which side is having the problem.
> Thanks,
> Curt

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