asn.dev

Observed topology

AS20965 GEANT GEANT Vereniging

Unclassified RIPE

Upstreams 6 carry this network
Downstreams 57 this network carries
Adjacent (IPv4) 63
Adjacent (IPv6) 51
Upstream graph Who carries AS20965, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS20965 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS20965: 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
AS21320GEANT VerenigingUnclassifiedIPv4 IPv6118
AS11537Internet2UnclassifiedIPv46
AS1103SURF B.V.UnclassifiedIPv4 IPv64
AS24490Trans-Eurasia Information Network (TEIN2) - SGUnclassifiedIPv4 IPv64
AS293ESnetUnclassifiedIPv42
AS7575Australian Academic and Research Network (AARNet)EducationIPv41

Transit

Downstream networks

All 57

Networks for which AS20965 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS680Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.UnclassifiedIPv4 IPv61,506
AS786Jisc Services LimitedEducationIPv4 IPv61,035
AS559SWITCHUnclassifiedIPv4 IPv6592
AS137Consortium GARRUnclassifiedIPv4 IPv6500
AS2614Agentia de Administrare a Retelei Nationale de Informatica pentru Educatie si CercetareEducationIPv4 IPv6436
AS1930Fundacao para a Ciencia e a Tecnologia, I.P.UnclassifiedIPv4 IPv6390
AS2200RenaterEducationIPv4 IPv6349
AS5408National Infrastructures for Research and Technology S.A.EducationIPv4 IPv6208
AS378Israel InterUniversity Computation CenterUnclassifiedIPv4 IPv6180
AS2611BELNETEducationIPv4 IPv6172

All 57 downstreams →

Adjacency

Adjacent networks

All 64

Every AS seen directly next to AS20965 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS11537Internet2UnclassifiedIPv4 IPv68,525
AS293ESnetUnclassifiedIPv43,405
AS24490Trans-Eurasia Information Network (TEIN2) - SGUnclassifiedIPv4 IPv63,380
AS680Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.UnclassifiedIPv4 IPv62,770
AS786Jisc Services LimitedEducationIPv4 IPv61,644
AS1103SURF B.V.UnclassifiedIPv4 IPv61,146
AS2200RenaterEducationIPv4 IPv61,129
AS137Consortium GARRUnclassifiedIPv4 IPv6937
AS2614Agentia de Administrare a Retelei Nationale de Informatica pentru Educatie si CercetareEducationIPv4 IPv6821
AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking CenterEducationIPv4 IPv6754

All 64 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M 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.