subnet.im

AS9824JCOM Co., Ltd.

JapanRegistryAPNICTypeEyeball

As of 26th September 2026, AS9824 (JCOM Co., Ltd.), an access network registered in Japan with APNIC, originates 231 IPv4 prefixes covering 10.3M addresses and 62 IPv6 prefixes. By IPv4 address space that makes it the 68th-largest of the 79,516 networks we see originating IPv4, and the 4th-largest of 729 in Japan. It is seen behind 7 upstream networks, most often AS2497 (Internet Initiative Japan Inc.) and AS2516 (KDDI Corporation), and in front of 21 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

231

IPv6 prefixes

62

IPv4 addresses

10.3M

IPv6 /64s

73B

Upstream graph

The networks AS9824 is seen behind, one and two hops out, drawn from real AS paths.

AS9824Toward the internet core
Upstream graph for AS9824: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS9824JCOM Co., Ltd.This networkAS1299Arelion (fka. Tel…AS2497Internet Initiati…AS2516KDDI CorporationAS6939Hurricane Electri…AS8220COLTAS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS15576NTS workspace AG

Networks observed one and two hops upstream of AS9824 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

63

adjacent networks

Upstreams
711%
Peers
3556%
Downstreams
2133%

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

Upstreams of AS9824
NetworkCountryRelationshipPathsVantage pts
AS2497Internet Initiative Japan Inc.JPPeer27,16996
AS2516KDDI CorporationJPPeer18,57399
AS1299Arelion (fka. Telia Carrier)SEPeer7,42727
AS6939Hurricane Electric LLCUSPeer2,4546
AS8220COLTGBPeer1,0172
AS9002RETN LimitedGBPeer7192
AS49544i3D.net B.VNLPeer7192

Prefixes

All 293

The largest blocks AS9824 originates, widest first.

Largest prefixes originated by AS9824
PrefixAddressesVisibility
27.136.0.0/13524k80/81
42.144.0.0/13524k80/81
110.128.0.0/13524k80/81
27.137.0.0/1665.5k81/81
27.138.0.0/1665.5k81/81
27.139.0.0/1665.5k81/81
27.140.0.0/1665.5k81/81
27.141.0.0/1665.5k81/81
27.143.0.0/1665.5k81/81
42.144.0.0/1665.5k81/81

Routing health

How AS9824'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%293
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%293
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 231 prefixes

IPv6 — 62 prefixes

  • /2934.4B × /641.6%1
  • /324.3B × /641.6%1
  • /341.1B × /6445.2%28
  • /37134M × /6451.6%32

Recent changes

Announcements that started or stopped since 27th Aug 2026.

No announcement by AS9824 started or stopped in this period.

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