AS42541 ASPA Check - FIBERBY ApS

Published

FIBERBY Fiberby ApS🇩🇰 - ASPA check for AS42541: the upstream transit providers AS42541 has authorized in its RPKI Autonomous System Provider Authorization (ASPA) object, and the networks that list AS42541 as their provider. Routers that validate ASPA use these records to detect route leaks in BGP paths.

ASPA Status
Published
Upstream Providers
3
Downstream Customers
4

How to read this ASPA check

The 3 providers below are the only networks allowed to appear directly above AS42541 in an AS-path. If AS42541 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

AS42541 peering topology: 3 upstream providers and 4 downstream customersUpstreams: AS1299, AS3356, AS6939. Downstreams: AS19281, AS204141, AS205235, AS207727.AS42541 - FIBERBY Fiberby ApSAS42541FIBERBY Fiberby ApSAS1299TWELVE99 Arelion Swed…AS1299 - TWELVE99 Arelion Sweden ABAS3356LEVEL3 - Level 3 Pare…AS3356 - LEVEL3 - Level 3 Parent, LLCAS6939HURRICANE - Hurricane…AS6939 - HURRICANE - Hurricane Electric LLCAS19281QUAD9-AS-1 - Quad9AS19281 - QUAD9-AS-1 - Quad9AS204141K-NET K-Net ForeningAS204141 - K-NET K-Net ForeningAS205235LABITAT LabitatAS205235 - LABITAT LabitatAS207727A5N Asbjorn Sloth Ton…AS207727 - A5N Asbjorn Sloth Tonnesen trading as a5nUPSTREAMSDOWNSTREAMS

Upstream Providers(3)

AS42541 authorizes these ASNs as upstream transit providers.

ASNName
AS1299🇸🇪TWELVE99 Arelion Sweden AB
AS3356🇺🇸LEVEL3 - Level 3 Parent, LLC
AS6939🇺🇸HURRICANE - Hurricane Electric LLC

Downstream Customers(4)

These ASNs list AS42541 as an authorized upstream provider.

ASNName
AS19281🇺🇸QUAD9-AS-1 - Quad9
AS204141🇩🇰K-NET K-Net Forening
AS205235🇩🇰LABITAT Labitat
AS207727🇩🇰A5N Asbjorn Sloth Tonnesen trading as a5n

ASPA object expires: 2026-10-27

Related Tools and Guides

← Back to AS42541