asn.dev

Observed topology

AS297 AS297 - National Aeronautics and Space Administration

Business ARIN Educational/Research

Upstreams 7 carry this network
Downstreams 5 this network carries
Adjacent (IPv4) 12
Adjacent (IPv6) 5
Upstream graph Who carries AS297, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS297 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS297: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS209CenturyLink Communications, LLCResidentialIPv4729
AS2914NTT America, Inc.TransitIPv4439
AS6939Hurricane Electric LLCTransitIPv4 IPv6270
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4134
AS11537Internet2UnclassifiedIPv440
AS2497Internet Initiative Japan Inc.UnclassifiedIPv422
AS293ESnetUnclassifiedIPv420

Transit

Downstream networks

inferred

Networks for which AS297 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS270National Aeronautics and Space AdministrationUnclassifiedIPv410,970
AS10343National Aeronautics and Space AdministrationUnclassifiedIPv4194
AS21556National Aeronautics and Space AdministrationUnclassifiedIPv4 IPv695
AS24National Aeronautics and Space AdministrationUnclassifiedIPv455
AS1848National Aeronautics and Space AdministrationUnclassifiedIPv453

Adjacency

Adjacent networks

All 12

Every AS seen directly next to AS297 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS270National Aeronautics and Space AdministrationUnclassifiedIPv411,619
AS209CenturyLink Communications, LLCResidentialIPv4 IPv65,689
AS2914NTT America, Inc.TransitIPv4 IPv64,124
AS6939Hurricane Electric LLCTransitIPv4 IPv62,051
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv61,037
AS11537Internet2UnclassifiedIPv4350
AS293ESnetUnclassifiedIPv4219
AS2497Internet Initiative Japan Inc.UnclassifiedIPv4200
AS10343National Aeronautics and Space AdministrationUnclassifiedIPv4194
AS21556National Aeronautics and Space AdministrationUnclassifiedIPv4 IPv695

All 12 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.