asn.dev

Observed topology

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

Residential APNIC Cable/DSL/ISP

Upstreams 5 carry this network
Downstreams 22 this network carries
Adjacent (IPv4) 26
Adjacent (IPv6) 9
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 IPv67,407
AS2516KDDI CORPORATIONMobileIPv4 IPv65,525
AS6939Hurricane Electric LLCTransitIPv42,276
AS1299Arelion Sweden ABTransitIPv4 IPv6591
AS9002RETN LimitedUnclassifiedIPv4 IPv6239

Transit

Downstream networks

All 22

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 IPv69,564
AS9617JCOM Co., Ltd.ResidentialIPv4 IPv66,203
AS9378JCOM Co., Ltd.ResidentialIPv42,116
AS9614JCOM Marketing Co.,Ltd.ResidentialIPv41,473
AS18134JCOM Co., Ltd.UnclassifiedIPv41,405
AS23788JCOM Co., Ltd.UnclassifiedIPv41,231
AS18136JCOM Co., Ltd.UnclassifiedIPv41,060
AS18283Chupicom Inc.ResidentialIPv4626
AS24276JCOM Co., Ltd.UnclassifiedIPv4354
AS23808TOSHIMA CABLE NETWORK CO.,LTDUnclassifiedIPv4234

All 22 downstreams →

Adjacency

Adjacent networks

All 27

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

ASNetworkTypeFamiliesPaths seen
AS2497Internet Initiative Japan Inc.UnclassifiedIPv4 IPv618,110
AS2516KDDI CORPORATIONMobileIPv4 IPv615,107
AS4721JCOM Co., Ltd.ResidentialIPv4 IPv69,564
AS9617JCOM Co., Ltd.ResidentialIPv4 IPv66,203
AS6939Hurricane Electric LLCTransitIPv46,007
AS9378JCOM Co., Ltd.ResidentialIPv42,116
AS1299Arelion Sweden ABTransitIPv4 IPv61,595
AS9614JCOM Marketing Co.,Ltd.ResidentialIPv41,473
AS18134JCOM Co., Ltd.UnclassifiedIPv41,405
AS23788JCOM Co., Ltd.UnclassifiedIPv41,231

All 27 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M 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.