Network topology

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

AS21373

Currently announcedSnapshot awaiting refresh

Banque Nationale de Belgique · NBB-AS

Last observed10/1/2026, 07:06:16Open ASN profile →

AS21373 relationship topology

Showing 2 / 2

AS21373Banque Nationale de Bel…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS5488Belgacom Proximus NV

Relationship: Upstream
Observed weight: 272
ASN registration country: Belgium
Latest RIS data: 9/30/2026, 00:00:00

Open AS5488 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
AS5488Observed weight 272	Belgacom Proximus NV	Upstream	Belgium	8/21/2019, 00:00:00	9/30/2026, 00:00:00	1,876	0
AS8220Observed weight 98	COLT COLT Technology Services Group Limited	Upstream	United Kingdom	8/21/2019, 00:00:00	9/30/2026, 00:00:00	282	0

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