Network topology

Relationships come from RIS AS_PATH observations; direction represents path position, not a commercial contract or traffic direction.

AS12971

Currently announcedSnapshot awaiting refresh

BIOS-AT Internet Viennaweb Service GmbH · BIOS-AT

Last observed9/30/2026, 08:09:30Open ASN profile →

AS12971 relationship topology

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AS12971BIOS-AT Internet Vienna…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS20751ASN-AZISTA AZISTA GmbH

Relationship: Upstream
Observed weight: 604
ASN registration country: Austria
Latest RIS data: 9/30/2026, 00:00:00

Open AS20751 profile →

All adjacent autonomous systems

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2 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS20751Observed weight 604	ASN-AZISTA AZISTA GmbH	Upstream	Austria	8/19/2019, 00:00:00	9/30/2026, 00:00:00	3,808	0
AS31239Observed weight 332	Johann Baldermann	Downstream	Austria	8/19/2019, 00:00:00	9/30/2026, 00:00:00	1,035	0

CHA.LA ASN relationship snapshotRelationships are normalized by CHA.LA from collected routing observations and registration context.CHA.LA routing observations · registration context