subnet.im

AS133405RETN Co., Ltd.

JapanRegistryAPNIC

As of 23rd October 2026, AS133405 (RETN Co., Ltd.), a network registered in Japan with APNIC, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,184th-largest of the 79,659 networks we see originating IPv4, and the 639th-largest of 731 in Japan. It is seen behind 1 upstream network, most often AS9002 (RETN Limited). 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

1

IPv6 prefixes

1

IPv4 addresses

256

IPv6 /64s

65.5k

Upstream graph

The networks AS133405 is seen behind, one and two hops out, drawn from real AS paths.

AS133405Toward the internet core
Upstream graph for AS133405: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS133405RETN Co., Ltd.This networkAS9002RETN LimitedAS3356Lumen (Level 3)AS6453TATA Communicatio…

Networks observed one and two hops upstream of AS133405 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS133405
NetworkCountryRelationshipPathsVantage pts
AS9002RETN LimitedGBPeer139139

Prefixes

The largest blocks AS133405 originates, widest first.

Largest prefixes originated by AS133405
PrefixAddressesVisibility
163.128.219.0/2425677/77
2001:df6:edc0::/4865.5k × /6462/64

Routing health

How AS133405'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%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS133405 started or stopped in this period.

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