Network topology

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

AS21975

Currently announcedSnapshot awaiting refresh

LOOMISSAYLES - LOOMIS SAYLES & CO., LP · LOOMISSAYLES

Last observed10/1/2026, 08:37:58Open ASN profile →

AS21975 relationship topology

Showing 4 / 4

AS21975LOOMIS SAYLES & CO., LP

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS46887CROWNCASTLE-AS46887 - Crown Castle Fiber LLC

Relationship: Upstream
Observed weight: 257
ASN registration country: United States
Latest RIS data: 10/13/2026, 00:00:00

Open AS46887 profile →

All adjacent autonomous systems

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4 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4
AS46887Observed weight 257	CROWNCASTLE-AS46887 - Crown Castle Fiber LLC	Upstream	United States	8/21/2019, 00:00:00	10/13/2026, 00:00:00	993
AS23132Observed weight 210	CHARTER-23132-SOUTHERN-NEW-ENGLAND-C3 - Charter Communications LLC	Upstream	United States	8/21/2019, 00:00:00	10/13/2026, 00:00:00	275
AS7046Observed weight 67	RFC2270-UUNET-CUSTOMER - Verizon Business	Upstream	United States	8/21/2019, 00:00:00	10/13/2026, 00:00:00	86
AS701Observed weight 2	UUNET - Verizon Business	Upstream	United States	8/21/2019, 00:00:00	10/13/2026, 00:00:00	15

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