Network topology

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

AS19957

Currently announcedSnapshot awaiting refresh

STATE-OF-TENNESSEE-NETTN - AT&T Enterprises, LLC · STATE-OF-TENNESSEE-NETTN

Last observed10/1/2026, 04:13:02Open ASN profile →

AS19957 relationship topology

Showing 3 / 3

AS19957AT&T Enterprises, LLC

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS7018ATT-INTERNET4 - AT&T Enterprises, LLC

Relationship: Upstream
Observed weight: 1,232
ASN registration country: United States
Latest RIS data: 11/2/2026, 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.

3 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4
AS7018Observed weight 1,232	ATT-INTERNET4 - AT&T Enterprises, LLC	Upstream	United States	8/21/2019, 00:00:00	11/2/2026, 00:00:00	19,291
AS16989Observed weight 423	The University of Tennessee Health Science Center	Downstream	United States	8/21/2019, 00:00:00	11/2/2026, 00:00:00	1,590
AS16473Observed weight 4	AT&T Enterprises, LLC	Upstream	United States	8/21/2019, 00:00:00	11/2/2026, 00:00:00	80

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