subnet.im

AS9370SAKURA Internet Inc.

JapanRegistryAPNICTypeContent

As of 27th September 2026, AS9370 (SAKURA Internet Inc.), a content network registered in Japan with APNIC, originates 39 IPv4 prefixes covering 341k addresses and 5 IPv6 prefixes. By IPv4 address space that makes it the 891st-largest of the 79,525 networks we see originating IPv4, and the 36th-largest of 729 in Japan. It is seen behind 13 upstream networks, most often AS2497 (Internet Initiative Japan Inc.) and AS2914 (NTT America, Inc.), and in front of 5 downstream networks. 84% 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

39

IPv6 prefixes

5

IPv4 addresses

341k

IPv6 /64s

68.7B

Upstream graph

The networks AS9370 is seen behind, one and two hops out, drawn from real AS paths.

AS9370Toward the internet core
Upstream graph for AS9370: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS9370SAKURA Internet I…This networkAS2497Internet Initiati…AS2516KDDI CorporationAS2914NTT America, Inc.AS6939Hurricane Electri…AS18106Viewqwest Pte LtdAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS3130RGnet OUAS49544i3D.net B.VAS20130Depaul UniversityAS215859Hetzner Cloud - S…

Networks observed one and two hops upstream of AS9370 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

66

adjacent networks

Upstreams
1320%
Peers
4873%
Downstreams
58%

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

Upstreams of AS9370
NetworkCountryRelationshipPathsVantage pts
AS2497Internet Initiative Japan Inc.JPPeer3,44057
AS2914NTT America, Inc.USPeer2,30049
AS2516KDDI CorporationJPPeer1,32442
AS6939Hurricane Electric LLCUSPeer2733
AS18106Viewqwest Pte LtdSGPeer2102
AS24482SG.GSSGPeer1342
AS9002RETN LimitedGBPeer1222
AS4775Globe TelecomsPHPeer1112
AS8966Etisalat (E&)AEPeer1051
AS35280F5 Networks SARLFRPeer972

Prefixes

All 44

The largest blocks AS9370 originates, widest first.

Largest prefixes originated by AS9370
PrefixAddressesVisibility
163.43.0.0/1665.5k81/81
36.53.0.0/1732.8k81/81
59.106.0.0/1732.8k81/81
160.16.0.0/1732.8k81/81
160.16.128.0/1732.8k81/81
36.53.128.0/1816.4k81/81
59.106.128.0/1816.4k81/81
27.133.128.0/198.2k81/81
59.106.192.0/198.2k81/81
113.20.160.0/198.2k81/81

Routing health

How AS9370'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

  • Valid84.1%37
  • Invalid0.0%0
  • No ROA15.9%7

Propagation

  • Globally propagated90% of full-feed peers or more100.0%44
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 39 prefixes

IPv6 — 5 prefixes

  • /2934.4B × /6420.0%1
  • /3017.2B × /6420.0%1
  • /318.6B × /6420.0%1
  • /324.3B × /6440.0%2

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS9370 started or stopped in this period.

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