Network topology

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

AS21489

Currently announcedSnapshot awaiting refresh

The North Atlantic Treaty Organization · SHAPE-AS

Last observed11/8/2026, 09:20:02Open ASN profile →

AS21489 relationship topology

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AS21489The North Atlantic Trea…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS5400BT British Telecommunications Limited

Relationship: Upstream
Observed weight: 289
ASN registration country: India
Latest RIS data: 10/12/2026, 16:00:00

Open AS5400 profile →

All adjacent autonomous systems

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1 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS5400Observed weight 289	BT British Telecommunications Limited	Upstream	India	8/21/2019, 00:00:00	10/12/2026, 16:00:00	2,324	0

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