asn.dev

Observed topology

AS397373 H4Y-TECHNOLOGIES - H4Y Technologies LLC

Hosting DROP-listed space APNIC

Upstreams 8 carry this network
Downstreams 8 this network carries
Adjacent (IPv4) 15
Adjacent (IPv6) 10
Upstream graph Who carries AS397373, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS397373 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS397373: 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
AS6939Hurricane Electric LLCTransitIPv4 IPv64,605
AS3356Level 3 Parent, LLCTransitIPv4 IPv63,856
AS174Cogent Communications, LLCTransitIPv4 IPv61,313
AS6461Zayo BandwidthTransitIPv4 IPv6831
AS40676Psychz NetworksHostingIPv4 IPv6751
AS53340VegasNAP, LLCHostingIPv4 IPv6630
AS14935Monticello Networks, Inc.HostingIPv4 IPv6106
AS17216DC74 LLCHostingIPv42

Transit

Downstream networks

inferred

Networks for which AS397373 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS399122VPS House Technology Group LLCUnclassifiedIPv4 IPv6911
AS199856Ping Technology Labs LTDUnclassifiedIPv4 IPv6293
AS39798MivoCloud SRLHostingIPv4 IPv6246
AS55082WINK Streaming LLCUnclassifiedIPv4198
AS399114HyonixHostingIPv4190
AS137571arebz.comUnclassifiedIPv4180
AS215286IXROOT LTDUnclassifiedIPv4120
AS14935Monticello Networks, Inc.HostingIPv4 IPv657

Adjacency

Adjacent networks

All 15

Every AS seen directly next to AS397373 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv65,181
AS3356Level 3 Parent, LLCTransitIPv4 IPv64,889
AS174Cogent Communications, LLCTransitIPv4 IPv61,726
AS6461Zayo BandwidthTransitIPv4 IPv6927
AS399122VPS House Technology Group LLCUnclassifiedIPv4 IPv6911
AS40676Psychz NetworksHostingIPv4 IPv6751
AS53340VegasNAP, LLCHostingIPv4 IPv6696
AS199856Ping Technology Labs LTDUnclassifiedIPv4 IPv6293
AS39798MivoCloud SRLHostingIPv4 IPv6246
AS55082WINK Streaming LLCUnclassifiedIPv4198

All 15 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.