asn.dev

Observed topology

AS55900 GLBB-JP - GLBB Japan KK

Unclassified ARIN

Upstreams 8 carry this network
Downstreams 8 this network carries
Adjacent (IPv4) 16
Adjacent (IPv6) 14
Upstream graph Who carries AS55900, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS55900 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS55900: 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
AS1299Arelion Sweden ABTransitIPv4 IPv6693
AS2497Internet Initiative Japan Inc.UnclassifiedIPv4 IPv6314
AS6939Hurricane Electric LLCTransitIPv4 IPv6258
AS3356Level 3 Parent, LLCTransitIPv4 IPv6243
AS2914NTT America, Inc.TransitIPv4 IPv6180
AS9002RETN LimitedUnclassifiedIPv4 IPv627
AS24482SG.GSHostingIPv4 IPv627
AS35280F5 Networks SARLHostingIPv42

Transit

Downstream networks

inferred

Networks for which AS55900 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS135607Infinivan IncorporatedResidentialIPv41,727
AS63774Kamoike.net LLPUnclassifiedIPv4 IPv6191
AS24277Okinawa Cable Network Inc.UnclassifiedIPv4 IPv6128
AS131951Suzuyo Shinwart CorporationUnclassifiedIPv4 IPv688
AS45679Tatsumi, TomoUnclassifiedIPv4 IPv687
AS55899irob Ltd.UnclassifiedIPv4 IPv618
AS146986SUZUYO SHINWART CORPORATIONUnclassifiedIPv4 IPv614
AS63800SERVER-G GroupHostingIPv44

Adjacency

Adjacent networks

All 16

Every AS seen directly next to AS55900 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS135607Infinivan IncorporatedResidentialIPv4 IPv64,993
AS1299Arelion Sweden ABTransitIPv4 IPv63,747
AS2914NTT America, Inc.TransitIPv4 IPv62,156
AS2497Internet Initiative Japan Inc.UnclassifiedIPv4 IPv61,498
AS146986SUZUYO SHINWART CORPORATIONUnclassifiedIPv4 IPv6946
AS6939Hurricane Electric LLCTransitIPv4 IPv6450
AS3356Level 3 Parent, LLCTransitIPv4 IPv6265
AS63774Kamoike.net LLPUnclassifiedIPv4 IPv6191
AS24277Okinawa Cable Network Inc.UnclassifiedIPv4 IPv6128
AS131951Suzuyo Shinwart CorporationUnclassifiedIPv4 IPv688

All 16 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.