subnet.im

AS24257Japan Internet Xing Co., Ltd.

JapanRegistryAPNIC

As of 11th November 2026, AS24257 (Japan Internet Xing Co., Ltd.), a network registered in Japan with APNIC, originates 5 IPv4 prefixes covering 1.5k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 31,739th-largest of the 80,747 networks we see originating IPv4, and the 510th-largest of 737 in Japan. It is seen behind 8 upstream networks, most often AS2518 (BIGLOBE Inc.) and AS10010 (TOKAI Communications Corporation), and in front of 1 downstream network. 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

5

IPv6 prefixes

3

IPv4 addresses

1.5k

IPv6 /64s

197k

Upstream graph

The networks AS24257 is seen behind, one and two hops out, drawn from real AS paths.

AS24257Toward the internet core
Upstream graph for AS24257: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS24257Japan Internet Xi…This networkAS2518BIGLOBE Inc.AS4637Telstra Internati…AS6939Hurricane Electri…AS7527Japan Internet Xi…AS10010TOKAI Communicati…AS16552Tiggee LLCAS32590Valve CorporationAS2516KDDI CorporationAS174Cogent Communicat…AS20130Depaul UniversityAS132337AxclusiveAS2497Internet Initiati…

Networks observed one and two hops upstream of AS24257 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

28

adjacent networks

Upstreams
829%
Peers
1968%
Downstreams
14%

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

Upstreams of AS24257
NetworkCountryRelationshipPathsVantage pts
AS2518BIGLOBE Inc.JPPeer34896
AS10010TOKAI Communications CorporationJPPeer18363
AS4637Telstra International LimitedHKPeer8383
AS7527Japan Internet Xing Co., Ltd.JPPeer7575
AS6939Hurricane Electric LLCUSPeer84
AS35280F5 Networks SARLFRPeer42
AS49544i3D.net B.VNLPeer42
AS4775Globe TelecomsPHAdjacent21

Prefixes

The largest blocks AS24257 originates, widest first.

Largest prefixes originated by AS24257
PrefixAddressesVisibility
103.2.8.0/2351275/76
202.90.11.0/2425676/76
202.90.12.0/2425676/76
202.90.13.0/2425676/76
202.90.14.0/2425676/76
2400:3000:70::/4865.5k × /6463/63
2400:3000:71::/4865.5k × /6463/63
2400:3000:72::/4865.5k × /6463/63

Routing health

How AS24257'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%8
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%8
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 5 prefixes

IPv6 — 3 prefixes

  • /4865.5k × /64100.0%3

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS24257 started or stopped in this period.

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