Network topology

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

AS20252

Currently announcedSnapshot awaiting refresh

Joan and Sanford I. Weill Medical College and Graduate School of Medical Sciences of Cornell University · JSIWMC

Last observed10/1/2026, 04:42:16Open ASN profile →

AS20252 relationship topology

Showing 5 / 5

AS20252Joan and Sanford I. Wei…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLC

Relationship: Upstream
Observed weight: 254
ASN registration country: United States
Latest RIS data: 10/29/2026, 00:00:00

Open AS46887 profile →

All adjacent autonomous systems

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5 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4
AS46887Observed weight 254	CROWNCASTLE-AS46887 - Crown Castle Fiber LLC	Upstream	United States	8/21/2019, 00:00:00	10/29/2026, 00:00:00	574
AS12271Observed weight 119	TWC-12271-NYC - Charter Communications Inc	Upstream	United States	8/21/2019, 00:00:00	10/29/2026, 00:00:00	431
AS174Observed weight 114	COGENT-174 - Cogent Communications, LLC	Upstream	United States	8/21/2019, 00:00:00	10/29/2026, 00:00:00	387
AS3754Observed weight 7	NYSERNET3-AS - NYSERNet	Upstream	United States	8/21/2019, 00:00:00	10/29/2026, 00:00:00	14
AS3630Observed weight 2	NYSERNET-BLK - NYSERNet	Upstream	United States	8/21/2019, 00:00:00	10/29/2026, 00:00:00	6

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