Network topology

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

AS5520

Currently announcedSnapshot awaiting refresh

Universitaet zu Koeln · UNI-KOELN

Last observed10/21/2026, 12:33:54Open ASN profile →

AS5520 relationship topology

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AS5520Universitaet zu Koeln

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS680DFN Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

Relationship: Upstream
Observed weight: 393
ASN registration country: Germany
Latest RIS data: 11/9/2026, 00:00:00

Open AS680 profile →

All adjacent autonomous systems

The table preserves every relationship in the selected filter; graph limits and pagination never remove data.

1 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS680Observed weight 393	DFN Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	Upstream	Germany	8/19/2019, 00:00:00	11/9/2026, 00:00:00	2,030	332

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