Network topology

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

AS2576

Currently announcedSnapshot awaiting refresh

U. S. Department of Transportation · DOT-AS

Last observed9/29/2026, 09:20:26Open ASN profile →

AS2576 relationship topology

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AS2576U. S. Department of Tra…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS13979ATT-IPFR - AT&T Enterprises, LLC

Relationship: Upstream
Observed weight: 393
ASN registration country: United States
Latest RIS data: 9/29/2026, 00:00:00

Open AS13979 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
AS13979Observed weight 393	ATT-IPFR - AT&T Enterprises, LLC	Upstream	United States	8/19/2019, 00:00:00	9/29/2026, 00:00:00	6,624	11,012

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