asn.dev

Observed topology

AS5408 GR-NET www.grnet.gr

Education RIPE

Upstreams 5 carry this network
Downstreams 30 this network carries
Adjacent (IPv4) 35
Adjacent (IPv6) 24
Upstream graph Who carries AS5408, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS5408 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS5408: 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 IPv61,356
AS13335Cloudflare, Inc.HostingIPv4249
AS20965GEANT VerenigingUnclassifiedIPv4 IPv6208
AS3491PCCW Global (HK) Ltd.TransitIPv476
AS8280SYNAPSECOM S.A. Provider of Telecommunications and Internet ServicesHostingIPv4 IPv626

Transit

Downstream networks

All 30

Networks for which AS5408 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS8248Computer Technology Institute and Press "Diophantus"EducationIPv4 IPv6502
AS8581University Of IoanninaEducationIPv4 IPv6468
AS8762Hellenic Mediterranean UniversityEducationIPv4 IPv6468
AS8643NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENSEducationIPv4 IPv6282
AS12402University of PiraeusUnclassifiedIPv4 IPv6282
AS15690NATIONAL OBSERVATORY OF ATHENSUnclassifiedIPv4 IPv6282
AS31563Hellenic National Meteorological ServiceUnclassifiedIPv4 IPv6250
AS8617of the AegeanEducationIPv4248
AS8618UniversityEducationIPv4248
AS8991Hellenic Centre for Marine ResearchUnclassifiedIPv4246

All 30 downstreams →

Adjacency

Adjacent networks

All 35

Every AS seen directly next to AS5408 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS21320GEANT VerenigingUnclassifiedIPv4 IPv66,590
AS20965GEANT VerenigingUnclassifiedIPv4 IPv6663
AS8248Computer Technology Institute and Press "Diophantus"EducationIPv4 IPv6502
AS8581University Of IoanninaEducationIPv4 IPv6468
AS8762Hellenic Mediterranean UniversityEducationIPv4 IPv6468
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv6326
AS8643NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENSEducationIPv4 IPv6282
AS12402University of PiraeusUnclassifiedIPv4 IPv6282
AS15690NATIONAL OBSERVATORY OF ATHENSUnclassifiedIPv4 IPv6282
AS8522Foundation of Research and Technology HellasEducationIPv4 IPv6252

All 35 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-23 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.15M 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.