Network topology

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

AS25

Currently announcedSnapshot awaiting refresh

UCB - University of California at Berkeley · UCB

Last observed10/21/2026, 19:33:59Open ASN profile →

AS25 relationship topology

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AS25University of Californi…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS2152CENIC-2152 - CENIC

Relationship: Upstream
Observed weight: 439
ASN registration country: United States
Latest RIS data: 10/26/2026, 00:00:00

Open AS2152 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
AS2152Observed weight 439	CENIC-2152 - CENIC	Upstream	United States	8/19/2019, 00:00:00	10/26/2026, 00:00:00	3,064	567

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