AS2852 ASPA Check - CESNET2 CESNET Z.S.P.O

Published

CESNET2 CESNET z.s.p.o.🇨🇿 - ASPA check for AS2852: the upstream transit providers AS2852 has authorized in its RPKI Autonomous System Provider Authorization (ASPA) object, and the networks that list AS2852 as their provider. Routers that validate ASPA use these records to detect route leaks in BGP paths.

ASPA Status
Published
Upstream Providers
9
Downstream Customers
2

How to read this ASPA check

The 9 providers below are the only networks allowed to appear directly above AS2852 in an AS-path. If AS2852 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

AS2852 peering topology: 9 upstream providers and 2 downstream customersUpstreams: AS174, AS1853, AS2607, AS6461, AS6762, AS6939, AS20965, AS21320 and more. Downstreams: AS2605, AS51727.AS2852 - CESNET2 CESNET z.s.p.o.AS2852CESNET2 CESNET z.s.p.…AS174COGENT-174 - Cogent C…AS174 - COGENT-174 - Cogent Communications, LLCAS1853ACOnet - ACONETAS1853 - ACOnet - ACONETAS2607SANET Zdruzenie pouzi…AS2607 - SANET Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANETAS6461ZAYO-6461 - Zayo Band…AS6461 - ZAYO-6461 - Zayo BandwidthAS6762SEABONE-NET TELECOM I…AS6762 - SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.AS6939HURRICANE - Hurricane…AS6939 - HURRICANE - Hurricane Electric LLCAS20965GEANT GEANT VerenigingAS20965 - GEANT GEANT VerenigingAS21320GEANT_IAS_VRF GEANT V…AS21320 - GEANT_IAS_VRF GEANT VerenigingView all 9 upstreams →AS2605CESNET CESNET z.s.p.o.AS2605 - CESNET CESNET z.s.p.o.AS51727SKODAPOWER-AS Doosan …AS51727 - SKODAPOWER-AS Doosan Skoda Power s.r.oUPSTREAMSDOWNSTREAMS

Upstream Providers(9)

AS2852 authorizes these ASNs as upstream transit providers.

ASNName
AS174🇺🇸COGENT-174 - Cogent Communications, LLC
AS1853🇦🇹ACOnet - ACONET
AS2607🇸🇰SANET Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANET
AS6461🇺🇸ZAYO-6461 - Zayo Bandwidth
AS6762🇮🇹SEABONE-NET TELECOM ITALIA SPARKLE S.p.A.
AS6939🇺🇸HURRICANE - Hurricane Electric LLC
AS20965🇳🇱GEANT GEANT Vereniging
AS21320🇳🇱GEANT_IAS_VRF GEANT Vereniging
AS60606🇨🇿Blindspot PRO-ZETA a.s.

Downstream Customers(2)

These ASNs list AS2852 as an authorized upstream provider.

ASNName
AS2605🇨🇿CESNET CESNET z.s.p.o.
AS51727🇨🇿SKODAPOWER-AS Doosan Skoda Power s.r.o

ASPA object expires: 2026-10-27

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