asn.dev

Observed topology

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

Unclassified RIPE

Upstreams 33 carry this network
Downstreams 31 this network carries
Adjacent (IPv4) 62
Adjacent (IPv6) 42
Upstream graph Who carries AS680, and who carries them, drawn as a map up to the transit-free core. 6 exchanges Where AS680 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 33

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 IPv63,628
AS6939Hurricane Electric LLCTransitIPv4 IPv62,350
AS1299Arelion Sweden ABTransitIPv4 IPv61,864
AS2914NTT America, Inc.TransitIPv4 IPv61,823
AS9002RETN LimitedUnclassifiedIPv4 IPv61,539
AS20965GEANT VerenigingUnclassifiedIPv4 IPv61,506
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6944
AS24482SG.GSHostingIPv4 IPv6324
AS37721Virtual-Technologies-Solutions-SAResidentialIPv4 IPv6324
AS42708Glesys ABUnclassifiedIPv4 IPv6324

All 33 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 IPv6843
AS12816Leibniz-RechenzentrumHostingIPv4 IPv6592
AS60824Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.UnclassifiedIPv4 IPv6573
AS49234Bundesministerium des Innern und fuer HeimatUnclassifiedIPv4513
AS5520Universitaet zu KoelnEducationIPv4 IPv6405
AS1754Deutsches Elektronen-Synchrotron DESYUnclassifiedIPv4248
AS43066Information und Technik Nordrhein-WestfalenUnclassifiedIPv4 IPv6244

All 31 downstreams →

Adjacency

Adjacent networks

All 67

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

ASNetworkTypeFamiliesPaths seen
AS3356Level 3 Parent, LLCTransitIPv4 IPv65,282
AS6939Hurricane Electric LLCTransitIPv4 IPv63,269
AS20965GEANT VerenigingUnclassifiedIPv4 IPv62,770
AS1299Arelion Sweden ABTransitIPv4 IPv62,490
AS2914NTT America, Inc.TransitIPv4 IPv62,431
AS9002RETN LimitedUnclassifiedIPv4 IPv62,108
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv61,730
AS553Universitaet StuttgartUnclassifiedIPv4 IPv61,220
AS200943Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.UnclassifiedIPv4 IPv61,219
AS47610RWTH Aachen UniversityUnclassifiedIPv4 IPv6877

All 67 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M 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.