1

I have seen AS4100000000 in some routing datasets I am working with, for example Routeviews:

194.153.134.0/24 AS4100000000

I would like to understand where it is coming from or who controls it so I know how to deal with it, i.e. if I can safely ignore it. My research so far didn't reveal helpful results.

Here is an example of what I did find, there was an announcement but no AS information seems to be available: https://www.cidr-report.org/cgi-bin/as-report?as=4100000000&view=6447 another https://bgp.he.net/AS4100000000

It is not in the bogon/internal use number ranges, so it should be valid but it still seems to be outside of normal use.

I guess the simplest explanation is that this is simply a leak? If that is the case, is there any significance to this number, i.e. why wasn't a number reserved for internal use chosen instead?

Improve this question

1 Answer 1

Reset to default
3

BGPView [1] has it listed as an Austrian company EDV Consulting Zoichter GmbH, but this may also be a glitch in the reporting output owing to it not having a registry entry and reprinting the prior entry.

HE shows that it is originating only a single prefix 194.153.134.0/24 [2], which looks to be owned by a Polish systems integrator call Atman [3][4]

I suspect that you are right and this is just a leak, by Atman (their real public AS is 24748)[5] and 4100000000 is listed as a peer.

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.