AS20057 ASPA Check - AT&T Enterprises

Published

ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC🇺🇸 - ASPA check for AS20057: the upstream transit providers AS20057 has authorized in its RPKI Autonomous System Provider Authorization (ASPA) object, and the networks that list AS20057 as their provider. Routers that validate ASPA use these records to detect route leaks in BGP paths.

ASPA Status
Published
Upstream Providers
1
Downstream Customers
0

How to read this ASPA check

The provider below is the only network allowed to appear directly above AS20057 in an AS-path. If AS20057 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

AS20057 peering topology: 1 upstream provider and 0 downstream customersUpstreams: AS7018. No downstreams.AS20057 - ATT-MOBILITY-LLC-AS20057 - ATT Enterprises, LLCAS20057ATT-MOBILITY-LLC-AS20…AS7018ATT-INTERNET4 - ATT E…AS7018 - ATT-INTERNET4 - ATT Enterprises, LLCUPSTREAMSDOWNSTREAMS

Upstream Providers(1)

AS20057 authorizes these ASNs as upstream transit providers.

ASNName
AS7018🇺🇸ATT-INTERNET4 - AT&T Enterprises, LLC

ASPA object expires: 2026-10-28

Related Tools and Guides

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