AS203757 ASPA Check - KLEGUL Gregor Czubayko

Published

KLEGUL Gregor Czubayko🇩🇪 - ASPA check for AS203757: the upstream transit providers AS203757 has authorized in its RPKI Autonomous System Provider Authorization (ASPA) object, and the networks that list AS203757 as their provider. Routers that validate ASPA use these records to detect route leaks in BGP paths.

ASPA Status
Published
Upstream Providers
2
Downstream Customers
0

How to read this ASPA check

The 2 providers below are the only networks allowed to appear directly above AS203757 in an AS-path. If AS203757 uses a transit provider that is missing from this list, routers that enforce ASPA treat its routes through that provider as invalid, so the list should include every current and backup transit provider. Peers do not belong in it.

Step-by-step ASPA check guide - including how to validate an AS-path hop by hop.

Peering Topology

AS203757 peering topology: 2 upstream providers and 0 downstream customersUpstreams: AS41108, AS204680. No downstreams.AS203757 - KLEGUL Gregor CzubaykoAS203757KLEGUL Gregor CzubaykoAS41108FirstRoot-AS comtranc…AS41108 - FirstRoot-AS comtrance service GmbHAS204680KIT-STUDENT Karlsruhe…AS204680 - KIT-STUDENT Karlsruhe Institute of TechnologyUPSTREAMSDOWNSTREAMS

Upstream Providers(2)

AS203757 authorizes these ASNs as upstream transit providers.

ASNName
AS41108🇩🇪FirstRoot-AS comtrance service GmbH
AS204680🇩🇪KIT-STUDENT Karlsruhe Institute of Technology

ASPA object expires: 2026-10-27

Related Tools and Guides

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