Network topology

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

AS1678

Currently announcedSnapshot awaiting refresh

The Dow Chemical Company · DOW

Last observed9/29/2026, 08:10:52Open ASN profile →

AS1678 relationship topology

Showing 4 / 4

AS1678The Dow Chemical Company

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS7018ATT-INTERNET4 - AT&T Enterprises, LLC

Relationship: Upstream
Observed weight: 264
ASN registration country: United States
Latest RIS data: 9/29/2026, 00:00:00

Open AS7018 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
AS7018Observed weight 264	ATT-INTERNET4 - AT&T Enterprises, LLC	Upstream	United States	8/19/2019, 00:00:00	9/29/2026, 00:00:00	7,328
AS5580Observed weight 256	GTT-ASIA GTT Communications Netherlands B.V.	Upstream	Netherlands	8/19/2019, 00:00:00	9/29/2026, 00:00:00	322
AS702Observed weight 255	UUNET - Verizon Business	Upstream	United States	8/19/2019, 00:00:00	9/29/2026, 00:00:00	640
AS3257Observed weight 22	GTT-BACKBONE GTT Communications Inc.	Upstream	Germany	8/19/2019, 00:00:00	9/29/2026, 00:00:00	38

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