asn.dev

Observed topology

AS3477 NOAA-NWAVE

Unclassified ARIN

Upstreams 2 carry this network
Downstreams 10 this network carries
Adjacent (IPv4) 12
Adjacent (IPv6) 9
Upstream graph Who carries AS3477, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS3477 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS3477: 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
AS11956National Oceanic and Atmospheric AdministrationUnclassifiedIPv4 IPv65,773
AS26100National Oceanic and Atmospheric AdministrationUnclassifiedIPv4 IPv6207

Transit

Downstream networks

inferred

Networks for which AS3477 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS2648National Oceanic and Atmospheric AdministrationUnclassifiedIPv4 IPv61,040
AS49National Institute of Standards and TechnologyUnclassifiedIPv4 IPv6953
AS5744United States Patent and Trademark OfficeUnclassifiedIPv4 IPv6407
AS30687National Weather Service Southern Region HeadquartersUnclassifiedIPv4300
AS40623Office of Oceanic and Atmospheric Research - Geophysical Fluid Dynamics LaboratoryUnclassifiedIPv4 IPv6186
AS16550Google LLCUnclassifiedIPv4182
AS12076Microsoft CorporationUnclassifiedIPv4122
AS3635U.S. Department of Commerce, Bureau of Economic AnalysisUnclassifiedIPv4 IPv693
AS6629National Oceanic and Atmospheric AdministrationUnclassifiedIPv4 IPv693
AS33343U.S. Department of Commerce, HQ and ITAUnclassifiedIPv4 IPv693

Adjacency

Adjacent networks

All 12

Every AS seen directly next to AS3477 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS11956National Oceanic and Atmospheric AdministrationUnclassifiedIPv4 IPv69,242
AS2648National Oceanic and Atmospheric AdministrationUnclassifiedIPv4 IPv61,040
AS49National Institute of Standards and TechnologyUnclassifiedIPv4 IPv6953
AS5744United States Patent and Trademark OfficeUnclassifiedIPv4 IPv6407
AS30687National Weather Service Southern Region HeadquartersUnclassifiedIPv4300
AS26100National Oceanic and Atmospheric AdministrationUnclassifiedIPv4 IPv6207
AS40623Office of Oceanic and Atmospheric Research - Geophysical Fluid Dynamics LaboratoryUnclassifiedIPv4 IPv6186
AS16550Google LLCUnclassifiedIPv4182
AS12076Microsoft CorporationUnclassifiedIPv4122
AS3635U.S. Department of Commerce, Bureau of Economic AnalysisUnclassifiedIPv4 IPv693

All 12 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-21 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.