Network topology

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

AS257

Currently announcedSnapshot awaiting refresh

DNIC-AS-00257 - Navy Network Information Center (NNIC) · DNIC-AS-00257

Last observed10/30/2026, 00:49:02Open ASN profile →

AS257 relationship topology

Showing 2 / 2

AS257Navy Network Informatio…

UpstreamDownstreamUncertain relationshipNodes are ordered by observed weight

SELECTED NODEAS2152CENIC-2152 - CENIC

Relationship: Upstream
Observed weight: 467
ASN registration country: United States
Latest RIS data: 10/29/2026, 00:00:00

Open AS2152 profile →

All adjacent autonomous systems

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

2 relationships

ASN	Organization	Relationship	ASN registration country	RIS observation start	Latest RIS data	IPv4	IPv6
AS2152Observed weight 467	CENIC-2152 - CENIC	Upstream	United States	8/19/2019, 00:00:00	10/29/2026, 00:00:00	648	345
AS2153Observed weight 11	CENIC-2153 - CENIC	Upstream	United States	8/19/2019, 00:00:00	10/29/2026, 00:00:00	37	0

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