asn.dev

Observed topology

AS9824 JTCL-JP-AS - JCOM Co., Ltd.

Residential APNIC

Upstreams 5 carry this network
Downstreams 21 this network carries
Adjacent (IPv4) 25
Adjacent (IPv6) 8
Upstream graph Who carries AS9824, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS9824 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS9824: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS2497Internet Initiative Japan Inc.UnclassifiedIPv4 IPv67,370
AS2516KDDI CORPORATIONMobileIPv4 IPv65,494
AS6939Hurricane Electric LLCTransitIPv42,276
AS1299Arelion Sweden ABTransitIPv4 IPv6588
AS9002RETN LimitedUnclassifiedIPv4 IPv6239

Transit

Downstream networks

All 21

Networks for which AS9824 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS4721JCOM Co., Ltd.ResidentialIPv4 IPv69,563
AS9617JCOM Co., Ltd.ResidentialIPv4 IPv66,170
AS9378JCOM Co., Ltd.ResidentialIPv42,101
AS9614JCOM Marketing Co.,Ltd.ResidentialIPv41,473
AS18134JCOM Co., Ltd.UnclassifiedIPv41,397
AS23788JCOM Co., Ltd.UnclassifiedIPv41,210
AS18136JCOM Co., Ltd.UnclassifiedIPv41,054
AS18283Chupicom Inc.ResidentialIPv4572
AS24276JCOM Co., Ltd.UnclassifiedIPv4354
AS23808TOSHIMA CABLE NETWORK CO.,LTDUnclassifiedIPv4230

All 21 downstreams →

Adjacency

Adjacent networks

All 26

Every AS seen directly next to AS9824 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS2497Internet Initiative Japan Inc.UnclassifiedIPv4 IPv617,805
AS2516KDDI CORPORATIONMobileIPv4 IPv615,129
AS4721JCOM Co., Ltd.ResidentialIPv4 IPv69,563
AS9617JCOM Co., Ltd.ResidentialIPv4 IPv66,170
AS6939Hurricane Electric LLCTransitIPv46,007
AS9378JCOM Co., Ltd.ResidentialIPv42,101
AS1299Arelion Sweden ABTransitIPv4 IPv61,592
AS9614JCOM Marketing Co.,Ltd.ResidentialIPv41,473
AS18134JCOM Co., Ltd.UnclassifiedIPv41,397
AS23788JCOM Co., Ltd.UnclassifiedIPv41,210

All 26 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.