asn.dev

Observed topology

AS680 DFN Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.

Unclassified RIPE

Upstreams 30 carry this network
Downstreams 31 this network carries
Adjacent (IPv4) 60
Adjacent (IPv6) 41
Upstream graph Who carries AS680, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS680 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 30

Networks observed carrying traffic for AS680: 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
AS3356Level 3 Parent, LLCTransitIPv4 IPv63,272
AS6939Hurricane Electric LLCTransitIPv4 IPv62,347
AS1299Arelion Sweden ABTransitIPv4 IPv62,140
AS2914NTT America, Inc.TransitIPv4 IPv62,092
AS9002RETN LimitedUnclassifiedIPv4 IPv61,526
AS20965GEANT VerenigingUnclassifiedIPv4 IPv61,489
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv61,227
AS24482SG.GSHostingIPv4 IPv6320
AS34019Hivane AssociationUnclassifiedIPv4 IPv6320
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv6320

All 30 upstreams →

Transit

Downstream networks

All 31

Networks for which AS680 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS200943Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.UnclassifiedIPv4 IPv61,219
AS553Universitaet StuttgartUnclassifiedIPv4 IPv61,202
AS47610RWTH Aachen UniversityUnclassifiedIPv4 IPv6877
AS5501Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.EducationIPv4 IPv6844
AS12816Leibniz-RechenzentrumHostingIPv4 IPv6592
AS60824Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.UnclassifiedIPv4 IPv6566
AS49234Bundesministerium des Innern und fuer HeimatUnclassifiedIPv4513
AS5520Universitaet zu KoelnEducationIPv4 IPv6406
AS1754Deutsches Elektronen-Synchrotron DESYUnclassifiedIPv4248
AS43066Information und Technik Nordrhein-WestfalenUnclassifiedIPv4 IPv6242

All 31 downstreams →

Adjacency

Adjacent networks

All 65

Every AS seen directly next to AS680 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3356Level 3 Parent, LLCTransitIPv4 IPv64,813
AS6939Hurricane Electric LLCTransitIPv4 IPv63,221
AS1299Arelion Sweden ABTransitIPv4 IPv62,864
AS2914NTT America, Inc.TransitIPv4 IPv62,789
AS20965GEANT VerenigingUnclassifiedIPv4 IPv62,755
AS9002RETN LimitedUnclassifiedIPv4 IPv62,092
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv62,011
AS553Universitaet StuttgartUnclassifiedIPv4 IPv61,220
AS200943Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.UnclassifiedIPv4 IPv61,219
AS47610RWTH Aachen UniversityUnclassifiedIPv4 IPv6877

All 65 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-15 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.09M 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.