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AS59103SoftEther Corporation

JapanRegistryAPNIC

As of 27th September 2026, AS59103 (SoftEther Corporation), a network registered in Japan with APNIC, originates 9 IPv4 prefixes covering 2.6k addresses and 8 IPv6 prefixes. By IPv4 address space that makes it the 23,021st-largest of the 79,525 networks we see originating IPv4, and the 451st-largest of 729 in Japan. It is seen behind 4 upstream networks, most often AS41095 (IPTP LTD) and AS10010 (TOKAI Communications Corporation), and in front of 15 downstream networks. None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

9

IPv6 prefixes

8

IPv4 addresses

2.6k

IPv6 /64s

1.4B

Upstream graph

The networks AS59103 is seen behind, one and two hops out, drawn from real AS paths.

AS59103Toward the internet core
Upstream graph for AS59103: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS59103SoftEther Corpora…This networkAS2907Science Informati…AS10010TOKAI Communicati…AS41095IPTP LTDAS140951IPTP NetworksAS2497Internet Initiati…AS174Cogent Communicat…AS4637Telstra Internati…AS6939Hurricane Electri…AS3356Lumen (Level 3)AS4775Globe TelecomsAS18106Viewqwest Pte Ltd

Networks observed one and two hops upstream of AS59103 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

39

adjacent networks

Upstreams
410%
Peers
2051%
Downstreams
1538%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS59103
NetworkCountryRelationshipPathsVantage pts
AS41095IPTP LTDGBPeer2,504122
AS10010TOKAI Communications CorporationJPPeer1,05095
AS2907Science Information NetworkJPPeer887145
AS140951IPTP NetworksHKPeer28127

Prefixes

The largest blocks AS59103 originates, widest first.

Largest prefixes originated by AS59103
PrefixAddressesVisibility
219.97.64.0/2351281/81
103.41.61.0/2425681/81
103.41.62.0/2425681/81
103.41.63.0/2425681/81
202.222.12.0/2425681/81
202.222.13.0/2425681/81
202.222.14.0/2425681/81
202.222.15.0/2425681/81
219.100.36.0/2425681/81
2401:af80:8000::/36268M × /6464/64

Routing health

How AS59103's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%17

Propagation

  • Globally propagated90% of full-feed peers or more100.0%17
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 9 prefixes

IPv6 — 8 prefixes

  • /36268M × /6450.0%4
  • /37134M × /6425.0%2
  • /4016.8M × /6425.0%2

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS59103 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.