Network topology

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

AS40831

Currently announcedSnapshot awaiting refresh

Mass General Brigham Incorporated · PHS

Last observed10/3/2026, 10:16:01Open ASN profile →

AS40831 relationship topology

Showing 4 / 4

AS40831Mass General Brigham In…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS40127LMANET - Longwood Medical and Academic Area (LMA)

Relationship: Upstream
Observed weight: 522
ASN registration country: United States
Latest RIS data: 10/3/2026, 00:00:00

Open AS40127 profile →

All adjacent autonomous systems

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4 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4
AS40127Observed weight 522	LMANET - Longwood Medical and Academic Area (LMA)	Upstream	United States	8/23/2019, 00:00:00	10/3/2026, 00:00:00	1,674
AS49915Observed weight 261	MEGAPORT Megaport (UK) Limited	Upstream	Ireland	8/23/2019, 00:00:00	10/3/2026, 00:00:00	329
AS46887Observed weight 260	CROWNCASTLE-AS46887 - Crown Castle Fiber LLC	Upstream	United States	8/23/2019, 00:00:00	10/3/2026, 00:00:00	335
AS394784Observed weight 258	Network name pending collection	Downstream	Registration country pending sync	8/23/2019, 00:00:00	10/3/2026, 00:00:00	666

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