subnet.im

AS38074SDCC Japan-West Area

JapanRegistryAPNIC

As of 27th September 2026, AS38074 (SDCC Japan-West Area), a network registered in Japan with APNIC, originates 3 IPv4 prefixes covering 768 addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 44,914th-largest of the 79,525 networks we see originating IPv4, and the 573rd-largest of 729 in Japan. It is seen behind 3 upstream networks, most often AS150363 (SoftEther Corporation) and AS59103 (SoftEther Corporation), and in front of 15 downstream networks. 80% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

3

IPv6 prefixes

2

IPv4 addresses

768

IPv6 /64s

2.1B

Upstream graph

The networks AS38074 is seen behind, one and two hops out, drawn from real AS paths.

AS38074Toward the internet core
Upstream graph for AS38074: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS38074SDCC Japan-West A…This networkAS59103SoftEther Corpora…AS63798Industrial Cyber …AS150363SoftEther Corpora…AS10010TOKAI Communicati…AS41095IPTP LTDAS2907Science Informati…AS2497Internet Initiati…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS38074 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

40

adjacent networks

Upstreams
38%
Peers
2255%
Downstreams
1538%

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

Upstreams of AS38074
NetworkCountryRelationshipPathsVantage pts
AS150363SoftEther CorporationJPPeer1,582145
AS59103SoftEther CorporationJPPeer10136
AS63798Industrial Cyber Security Center of ExcellenceJPPeer93

Prefixes

The largest blocks AS38074 originates, widest first.

Largest prefixes originated by AS38074
PrefixAddressesVisibility
44.31.25.0/2425681/81
103.152.178.0/2425681/81
103.160.48.0/2425681/81
2406:7ec0::/332.1B × /6464/64
2001:df4:1780::/4865.5k × /6464/64

Routing health

How AS38074'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

  • Valid80.0%4
  • Invalid0.0%0
  • No ROA20.0%1

Propagation

  • Globally propagated90% of full-feed peers or more100.0%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 3 prefixes

IPv6 — 2 prefixes

  • /332.1B × /6450.0%1
  • /4865.5k × /6450.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS38074 started or stopped in this period.

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