Network topology

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

AS43861

Currently announcedSnapshot awaiting refresh

Circle B B.V. · CIRCLEB-ASN

Last observed10/3/2026, 19:46:09Open ASN profile →

AS43861 relationship topology

Showing 3 / 3

AS43861Circle B B.V.

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS8220COLT COLT Technology Services Group Limited

Relationship: Upstream
Observed weight: 333
ASN registration country: United Kingdom
Latest RIS data: 10/3/2026, 00:00:00

Open AS8220 profile →

All adjacent autonomous systems

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3 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS8220Observed weight 333	COLT COLT Technology Services Group Limited	Upstream	United Kingdom	8/23/2019, 00:00:00	10/3/2026, 00:00:00	1,354	597
AS38930Observed weight 155	FIBERRING LeaseWeb Network B.V.	Upstream	Netherlands	8/23/2019, 00:00:00	10/3/2026, 00:00:00	280	98
AS209870Observed weight 135	Cylo Ltd	Downstream	United Kingdom	8/23/2019, 00:00:00	10/3/2026, 00:00:00	246	0

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