AS25538 ASPA Check - IN ULM Internet Ulm/Neu Ulm E.V

Published

IN-ULM Internet Ulm/Neu-Ulm e.V.🇩🇪 - ASPA check for AS25538: the upstream transit providers AS25538 has authorized in its RPKI Autonomous System Provider Authorization (ASPA) object, and the networks that list AS25538 as their provider. Routers that validate ASPA use these records to detect route leaks in BGP paths.

ASPA Status
Published
Upstream Providers
4
Downstream Customers
1

How to read this ASPA check

The 4 providers below are the only networks allowed to appear directly above AS25538 in an AS-path. If AS25538 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

AS25538 peering topology: 4 upstream providers and 1 downstream customerUpstreams: AS553, AS6939, AS41051, AS48284. Downstreams: AS219090.AS25538 - IN-ULM Internet Ulm/Neu-Ulm e.V.AS25538IN-ULM Internet Ulm/N…AS553BELWUE Universitaet S…AS553 - BELWUE Universitaet StuttgartAS6939HURRICANE - Hurricane…AS6939 - HURRICANE - Hurricane Electric LLCAS41051FREETRANSIT Openfacto…AS41051 - FREETRANSIT Openfactory GmbHAS48284TELENET-AS SWU TeleNe…AS48284 - TELENET-AS SWU TeleNet GmbHAS219090FIBERGARDEN Temporaer…AS219090 - FIBERGARDEN Temporaerhaus e.V.UPSTREAMSDOWNSTREAMS

Upstream Providers(4)

AS25538 authorizes these ASNs as upstream transit providers.

ASNName
AS553🇩🇪BELWUE Universitaet Stuttgart
AS6939🇺🇸HURRICANE - Hurricane Electric LLC
AS41051🇨🇭FREETRANSIT Openfactory GmbH
AS48284🇩🇪TELENET-AS SWU TeleNet GmbH

Downstream Customers(1)

These ASNs list AS25538 as an authorized upstream provider.

ASNName
AS219090🇩🇪FIBERGARDEN Temporaerhaus e.V.

ASPA object expires: 2026-10-27

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