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 IPv64,469
AS3356Level 3 Parent, LLCTransitIPv4 IPv63,784
AS174Cogent Communications, LLCTransitIPv4 IPv61,311
AS40676Psychz NetworksHostingIPv4 IPv6739
AS6461Zayo BandwidthTransitIPv4 IPv6728
AS53340VegasNAP, LLCHostingIPv4 IPv6612
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 IPv6901
AS199856Ping Technology Labs LTDUnclassifiedIPv4 IPv6288
AS39798MivoCloud SRLHostingIPv4 IPv6243
AS55082WINK Streaming LLCUnclassifiedIPv4192
AS399114HyonixHostingIPv4185
AS137571arebz.comUnclassifiedIPv4177
AS215286IXROOT LTDUnclassifiedIPv4118
AS14935Monticello Networks, Inc.HostingIPv4 IPv666

Adjacency

Adjacent networks

All 15

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

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv65,040
AS3356Level 3 Parent, LLCTransitIPv4 IPv64,812
AS174Cogent Communications, LLCTransitIPv4 IPv61,724
AS399122VPS House Technology Group LLCUnclassifiedIPv4 IPv6901
AS6461Zayo BandwidthTransitIPv4 IPv6811
AS40676Psychz NetworksHostingIPv4 IPv6739
AS53340VegasNAP, LLCHostingIPv4 IPv6676
AS199856Ping Technology Labs LTDUnclassifiedIPv4 IPv6288
AS39798MivoCloud SRLHostingIPv4 IPv6243
AS55082WINK Streaming LLCUnclassifiedIPv4192

All 15 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-09 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.03M 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.