Network topology

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

AS28949

Currently announcedSnapshot awaiting refresh

Technical University of Sofia · TUSNET-AS

Last observed10/2/2026, 03:26:09Open ASN profile →

AS28949 relationship topology

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AS28949Technical University of…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS8717A1BG A1 Bulgaria EAD

Relationship: Upstream
Observed weight: 227
ASN registration country: Bulgaria
Latest RIS data: 10/1/2026, 00:00:00

Open AS8717 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
AS8717Observed weight 227	A1BG A1 Bulgaria EAD	Upstream	Bulgaria	8/21/2019, 00:00:00	10/1/2026, 00:00:00	4,847	0
AS6802Observed weight 57	UNICOM-B-AS Bulgarian Research and Education Network Association (BREN)	Upstream	Bulgaria	8/21/2019, 00:00:00	10/1/2026, 00:00:00	1,188	0

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