Network topology

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

AS637

Currently announcedSnapshot awaiting refresh

United States Department of Defense (DoD) · DNIC-ASBLK-00616-00665

Last observed9/29/2026, 06:38:09Open ASN profile →

AS637 relationship topology

Showing 3 / 3

AS637United States Departmen…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS27066DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD)

Relationship: Upstream
Observed weight: 488
ASN registration country: United States
Latest RIS data: 9/28/2026, 00:00:00

Open AS27066 profile →

All adjacent autonomous systems

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3 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4
AS27066Observed weight 488	DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD)	Upstream	United States	8/19/2019, 00:00:00	9/28/2026, 00:00:00	24,553
AS27064Observed weight 293	DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD)	Upstream	United States	8/19/2019, 00:00:00	9/28/2026, 00:00:00	138,021
AS27065Observed weight 292	DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD)	Upstream	United States	8/19/2019, 00:00:00	9/28/2026, 00:00:00	11,554

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