Network topology

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

AS13205

Currently announcedSnapshot awaiting refresh

British Telecommunications Limited · UNSPECIFIED

Last observed9/30/2026, 08:54:54Open ASN profile →

AS13205 relationship topology

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AS13205British Telecommunicati…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS5400BT British Telecommunications Limited

Relationship: Upstream
Observed weight: 272
ASN registration country: India
Latest RIS data: 10/12/2026, 16:00:00

Open AS5400 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
AS5400Observed weight 272	BT British Telecommunications Limited	Upstream	India	8/19/2019, 00:00:00	10/12/2026, 16:00:00	4,305	0
AS2856Observed weight 264	BT-UK-AS British Telecommunications Limited	Upstream	United Kingdom	8/19/2019, 00:00:00	10/12/2026, 16:00:00	336	0

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