Network topology

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

AS1224

Currently announcedSnapshot awaiting refresh

University of Illinois · NCSA-AS

Last observed11/1/2026, 00:19:22Open ASN profile →

AS1224 relationship topology

Showing 3 / 3

AS1224University of Illinois

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS40387UI-ICCN - University of Illinois

Relationship: Upstream
Observed weight: 449
ASN registration country: United States
Latest RIS data: 10/31/2026, 00:00:00

Open AS40387 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
AS40387Observed weight 449	UI-ICCN - University of Illinois	Upstream	United States	8/19/2019, 00:00:00	10/31/2026, 00:00:00	714	316
AS22335Observed weight 37	MREN - Metropolitan Research and Education Network	Upstream	United States	8/19/2019, 00:00:00	10/31/2026, 00:00:00	47	41
AS293Observed weight 1	ESNET - ESnet	Upstream	United States	8/19/2019, 00:00:00	10/31/2026, 00:00:00	2	1

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