subnet.im

AS9371SAKURA Internet Inc.

JapanRegistryAPNICTypeContent

As of 11th November 2026, AS9371 (SAKURA Internet Inc.), a content network registered in Japan with APNIC, originates 22 IPv4 prefixes covering 307k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 981st-largest of the 80,747 networks we see originating IPv4, and the 38th-largest of 737 in Japan. It is seen behind 6 upstream networks, most often AS2914 (NTT America, Inc.) and AS2497 (Internet Initiative Japan Inc.), and in front of 3 downstream networks. Every one of its announcements has 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

22

IPv6 prefixes

1

IPv4 addresses

307k

IPv6 /64s

4.3B

Upstream graph

The networks AS9371 is seen behind, one and two hops out, drawn from real AS paths.

AS9371Toward the internet core
Upstream graph for AS9371: 10 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS9371SAKURA Internet I…This networkAS2497Internet Initiati…AS2516KDDI CorporationAS2914NTT America, Inc.AS6939Hurricane Electri…AS9370SAKURA Internet I…AS1299Arelion (fka. Tel…AS49544i3D.net B.VAS215859Hetzner Cloud - S…AS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS9371 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

42

adjacent networks

Upstreams
614%
Peers
3379%
Downstreams
37%

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

Upstreams of AS9371
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer1,73453
AS2497Internet Initiative Japan Inc.JPPeer86348
AS2516KDDI CorporationJPPeer20739
AS6939Hurricane Electric LLCUSPeer884
AS9370SAKURA Internet Inc.JPPeer464
AS35280F5 Networks SARLFRPeer232

Prefixes

The largest blocks AS9371 originates, widest first.

Largest prefixes originated by AS9371
PrefixAddressesVisibility
49.212.0.0/1665.5k76/76
133.167.0.0/1665.5k76/76
160.27.0.0/1665.5k76/76
219.94.128.0/1732.8k76/76
182.48.0.0/1816.4k76/76
112.78.192.0/198.2k76/76
182.163.0.0/198.2k76/76
210.188.192.0/198.2k76/76
210.224.160.0/198.2k76/76
219.109.160.0/198.2k76/76

Routing health

How AS9371'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

  • Valid100.0%23
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%23
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 22 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS9371 started or stopped in this period.

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