asn.dev

Observed topology

AS559 SWITCH Switch, Swiss Academic and Research Network

Unclassified RIPE

Upstreams 32 carry this network
Downstreams 6 this network carries
Adjacent (IPv4) 37
Adjacent (IPv6) 23
Upstream graph Who carries AS559, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS559 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 32

Networks observed carrying traffic for AS559: 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 IPv61,409
AS1299Arelion Sweden ABTransitIPv4 IPv61,249
AS6939Hurricane Electric LLCTransitIPv4 IPv6922
AS20965GEANT VerenigingUnclassifiedIPv4 IPv6592
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6484
AS3257GTT Communications Inc.TransitIPv4 IPv6429
AS21320GEANT VerenigingUnclassifiedIPv4351
AS1836green.ch AGResidentialIPv4 IPv6126
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv6126
AS24482SG.GSHostingIPv4 IPv6126

All 32 upstreams →

Transit

Downstream networks

inferred

Networks for which AS559 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS213196Universitaetsspital BaselUnclassifiedIPv4616
AS200233Berner FachhochschuleUnclassifiedIPv4 IPv6254
AS196722Schweizerische NationalbankUnclassifiedIPv4208
AS202123Nationale Alarmzentrale NEOCUnclassifiedIPv4152
AS205218Ente Ospedaliero CantonaleUnclassifiedIPv448
AS211540Stiftung Kantonsspital GraubuendenUnclassifiedIPv4 IPv647

Adjacency

Adjacent networks

All 42

Every AS seen directly next to AS559 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,646
AS1299Arelion Sweden ABTransitIPv4 IPv61,421
AS6939Hurricane Electric LLCTransitIPv4 IPv61,084
AS20965GEANT VerenigingUnclassifiedIPv4 IPv6723
AS213196Universitaetsspital BaselUnclassifiedIPv4616
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6561
AS3257GTT Communications Inc.TransitIPv4 IPv6491
AS21320GEANT VerenigingUnclassifiedIPv4 IPv6431
AS200233Berner FachhochschuleUnclassifiedIPv4 IPv6254
AS196722Schweizerische NationalbankUnclassifiedIPv4208

All 42 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-12 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.21M 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.