Network topology

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

AS721

Currently announcedSnapshot awaiting refresh

DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) · DNIC-ASBLK-00721-00726

Last observed11/7/2026, 17:10:40Open ASN profile →

AS721 relationship topology

Showing 4 / 4

AS721United States Departmen…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS3356LEVEL3 - Level 3 Parent, LLC

Relationship: Upstream
Observed weight: 81,935
ASN registration country: United States
Latest RIS data: 11/3/2026, 00:00:00

Open AS3356 profile →

All adjacent autonomous systems

The table preserves every relationship in the selected filter; graph limits and pagination never remove data.

4 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS3356Observed weight 81,935	LEVEL3 - Level 3 Parent, LLC	Upstream	United States	8/19/2019, 00:00:00	11/3/2026, 00:00:00	4,116,906	132,393
AS27064Observed weight 54,484	United States Department of Defense (DoD)	Downstream	United States	8/19/2019, 00:00:00	11/3/2026, 00:00:00	3,193,774	115,620
AS27065Observed weight 15,993	DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD)	Downstream	United States	8/19/2019, 00:00:00	11/3/2026, 00:00:00	417,854	9,158
AS27066Observed weight 11,066	DNIC-ASBLK-27032-27159 - United States Department of Defense (DoD)	Downstream	United States	8/19/2019, 00:00:00	11/3/2026, 00:00:00	429,598	6,949

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