asn.dev

Observed topology

AS59103 SOFTETHER - SoftEther Corporation

Unclassified APNIC

Upstreams 4 carry this network
Downstreams 15 this network carries
Adjacent (IPv4) 17
Adjacent (IPv6) 16
Upstream graph Who carries AS59103, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS59103 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS59103: 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
AS2907Research Organization of Information and Systems, National Institute of InformaticsUnclassifiedIPv4 IPv6559
AS41095IPTP LTDHostingIPv4 IPv6162
AS10010TOKAI Communications CorporationResidentialIPv4 IPv656
AS140951IPTP NetworksUnclassifiedIPv4 IPv636

Transit

Downstream networks

All 15

Networks for which AS59103 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS18127Ibaraki Prefectural GovernmentUnclassifiedIPv4 IPv6901
AS36599SoftEther Telecommunication Research Institute, LLCVPNIPv4248
AS63770Industrial Cyber Security Center of ExcellenceUnclassifiedIPv4 IPv692
AS63799Ghost NetworkUnclassifiedIPv4 IPv658
AS59105Home NOC Operators GroupUnclassifiedIPv4 IPv657
AS45679Tatsumi, TomoUnclassifiedIPv4 IPv646
AS63781Kobayashi Family Net LLPUnclassifiedIPv4 IPv643
AS146980Tokyo Metropolitan College of Industrial Technology Infomation System Engineering CourseUnclassifiedIPv4 IPv638
AS151388SoftEther Corporation (SE-JIKKEN-AS)UnclassifiedIPv634
AS63774Kamoike.net LLPUnclassifiedIPv428

All 15 downstreams →

Adjacency

Adjacent networks

All 19

Every AS seen directly next to AS59103 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS41095IPTP LTDHostingIPv4 IPv61,067
AS18127Ibaraki Prefectural GovernmentUnclassifiedIPv4 IPv6962
AS10010TOKAI Communications CorporationResidentialIPv4 IPv6845
AS2907Research Organization of Information and Systems, National Institute of InformaticsUnclassifiedIPv4 IPv6637
AS36599SoftEther Telecommunication Research Institute, LLCVPNIPv4248
AS59105Home NOC Operators GroupUnclassifiedIPv4 IPv6228
AS140951IPTP NetworksUnclassifiedIPv4 IPv6182
AS63770Industrial Cyber Security Center of ExcellenceUnclassifiedIPv4 IPv6162
AS63799Ghost NetworkUnclassifiedIPv4 IPv658
AS45679Tatsumi, TomoUnclassifiedIPv4 IPv646

All 19 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-31 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.50M 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.