asn.dev

Observed topology

AS51907 CH-ZG

Unclassified RIPE

Upstreams 29 carry this network
Downstreams 3 this network carries
Adjacent (IPv4) 27
Adjacent (IPv6) 18
Upstream graph Who carries AS51907, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS51907 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 29

Networks observed carrying traffic for AS51907: 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
AS39040NTS workspace AGUnclassifiedIPv4 IPv632
AS34288Kantonsschule ZugUnclassifiedIPv4 IPv624
AS15576NTS workspace AGUnclassifiedIPv4 IPv619
AS6939Hurricane Electric LLCTransitIPv412
AS9002RETN LimitedUnclassifiedIPv4 IPv610
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv67
AS50304Blix Solutions ASUnclassifiedIPv44
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv63
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv63
AS24482SG.GSHostingIPv4 IPv63

All 29 upstreams →

Transit

Downstream networks

inferred

Networks for which AS51907 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS34288Kantonsschule ZugUnclassifiedIPv4 IPv673
AS219256Kanton ZugUnclassifiedIPv636
AS211452Kanton Appenzell AusserrhodenUnclassifiedIPv4 IPv614

Adjacency

Adjacent networks

All 32

Every AS seen directly next to AS51907 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS39040NTS workspace AGUnclassifiedIPv4 IPv6158
AS34288Kantonsschule ZugUnclassifiedIPv4 IPv6140
AS219256Kanton ZugUnclassifiedIPv636
AS15576NTS workspace AGUnclassifiedIPv4 IPv629
AS211452Kanton Appenzell AusserrhodenUnclassifiedIPv4 IPv614
AS9002RETN LimitedUnclassifiedIPv4 IPv613
AS6939Hurricane Electric LLCTransitIPv412
AS6730Sunrise GmbHMobileIPv49
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv68
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv64

All 32 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-20 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.16M 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.