asn.dev

Observed topology

AS31736 SENSELAN-AS senseLAN GmbH

Residential RIPE Cable/DSL/ISP

Upstreams 12 carry this network
Downstreams 3 this network carries
Adjacent (IPv4) 12
Adjacent (IPv6) 9
Upstream graph Who carries AS31736, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS31736 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 12

Networks observed carrying traffic for AS31736: 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
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv6343
AS1299Arelion Sweden ABTransitIPv4 IPv6302
AS13030Init7 (Switzerland) Ltd.HostingIPv4 IPv6284
AS6939Hurricane Electric LLCTransitIPv4 IPv6260
AS174Cogent Communications, LLCTransitIPv4116
AS24482SG.GSHostingIPv4 IPv628
AS34019Hivane AssociationUnclassifiedIPv4 IPv628
AS33891Core-Backbone GmbHHostingIPv419
AS9002RETN LimitedUnclassifiedIPv618
AS1836green.ch AGResidentialIPv69

All 12 upstreams →

Transit

Downstream networks

inferred

Networks for which AS31736 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS42155Evard AGUnclassifiedIPv4118
AS48461stepping stone AGUnclassifiedIPv4102
AS203882Altern8 SAHostingIPv451

Adjacency

Adjacent networks

All 15

Every AS seen directly next to AS31736 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv6445
AS1299Arelion Sweden ABTransitIPv4 IPv6343
AS13030Init7 (Switzerland) Ltd.HostingIPv4 IPv6322
AS6939Hurricane Electric LLCTransitIPv4 IPv6260
AS174Cogent Communications, LLCTransitIPv4206
AS42155Evard AGUnclassifiedIPv4118
AS48461stepping stone AGUnclassifiedIPv4102
AS203882Altern8 SAHostingIPv451
AS24482SG.GSHostingIPv4 IPv628
AS34019Hivane AssociationUnclassifiedIPv4 IPv628

All 15 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-05 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 73.57M 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.