asn.dev

Observed topology

AS29987 SINFONY6

Unclassified ARIN Educational/Research

Upstreams 2 carry this network
Downstreams 1 this network carries
Adjacent (IPv4) 3
Adjacent (IPv6) 0
Upstream graph Who carries AS29987, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS29987 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS29987: 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
AS3257GTT Communications Inc.TransitIPv4880
AS32097WholeSale Internet, Inc.HostingIPv4414

Transit

Downstream networks

inferred

Networks for which AS29987 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS14571Oi S.A. - Em Recuperacao JudicialHostingIPv41,853

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS29987 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3257GTT Communications Inc.TransitIPv42,733
AS14571Oi S.A. - Em Recuperacao JudicialHostingIPv41,853
AS32097WholeSale Internet, Inc.HostingIPv4414

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-20 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.16M 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.