AS33891 ASPA Check - CORE BACKBONE Core Backbone

Published

CORE-BACKBONE Core-Backbone GmbH🇩🇪 - ASPA check for AS33891: the upstream transit providers AS33891 has authorized in its RPKI Autonomous System Provider Authorization (ASPA) object, and the networks that list AS33891 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
36

How to read this ASPA check

The 4 providers below are the only networks allowed to appear directly above AS33891 in an AS-path. If AS33891 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

AS33891 peering topology: 4 upstream providers and 36 downstream customersUpstreams: AS1299, AS3257, AS3320, AS3356. Downstreams: AS3303, AS4777, AS5539, AS8412, AS15945, AS18001, AS24940, AS29670 and more.AS33891 - CORE-BACKBONE Core-Backbone GmbHAS33891CORE-BACKBONE Core-Ba…AS1299TWELVE99 Arelion Swed…AS1299 - TWELVE99 Arelion Sweden ABAS3257GTT-BACKBONE GTT Comm…AS3257 - GTT-BACKBONE GTT Communications Inc.AS3320DTAG Deutsche Telekom…AS3320 - DTAG Deutsche Telekom AGAS3356LEVEL3 - Level 3 Pare…AS3356 - LEVEL3 - Level 3 Parent, LLCAS3303SWISSCOM Swisscom (Sc…AS3303 - SWISSCOM Swisscom (Schweiz) AGAS4777APNIC-COLO - Asia Pac…AS4777 - APNIC-COLO - Asia Pacific Network Information CentreAS5539SPACENET SpaceNet GmbHAS5539 - SPACENET SpaceNet GmbHAS8412TMA T-Mobile Austria …AS8412 - TMA T-Mobile Austria GmbHAS15945PfalzKom-Net PFALZKOM…AS15945 - PfalzKom-Net PFALZKOM GmbHAS18001DIALOG-AS - Dialog Ax…AS18001 - DIALOG-AS - Dialog Axiata PLC.AS24940HETZNER-AS Hetzner On…AS24940 - HETZNER-AS Hetzner Online GmbHAS29670IN-BERLIN-AS Individu…AS29670 - IN-BERLIN-AS Individual Network Berlin (IN-Berlin) e.V.View all 36 downstreams →UPSTREAMSDOWNSTREAMS

Upstream Providers(4)

AS33891 authorizes these ASNs as upstream transit providers.

ASNName
AS1299🇸🇪TWELVE99 Arelion Sweden AB
AS3257🇺🇸GTT-BACKBONE GTT Communications Inc.
AS3320🇩🇪DTAG Deutsche Telekom AG
AS3356🇺🇸LEVEL3 - Level 3 Parent, LLC

Downstream Customers(36)

These ASNs list AS33891 as an authorized upstream provider.

ASNName
AS3303🇨🇭SWISSCOM Swisscom (Schweiz) AG
AS4777🇯🇵APNIC-COLO - Asia Pacific Network Information Centre
AS5539🇩🇪SPACENET SpaceNet GmbH
AS8412🇦🇹TMA T-Mobile Austria GmbH
AS15945🇩🇪PfalzKom-Net PFALZKOM GmbH
AS18001🇱🇰DIALOG-AS - Dialog Axiata PLC.
AS24940🇩🇪HETZNER-AS Hetzner Online GmbH
AS29670🇩🇪IN-BERLIN-AS Individual Network Berlin ("IN-Berlin") e.V.
AS39040🇨🇭NTSWorkspaceAG-AS39040 NTS workspace AG
AS39878🇦🇹RAUTER-AS Peter Rauter GmbH
36 total
1 / 4

ASPA object expires: 2026-10-27

Related Tools and Guides

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