asn.dev

Observed topology

AS57154 SWKN Stadtwerke Konstanz GmbH

Residential RIPE Cable/DSL/ISP

Upstreams 19 carry this network
Downstreams 1 this network carries
Adjacent (IPv4) 20
Adjacent (IPv6) 16
Upstream graph Who carries AS57154, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS57154 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 19

Networks observed carrying traffic for AS57154: 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
AS205112PHILUNET GmbHUnclassifiedIPv4 IPv6233
AS60169R-KOM Regensburger Telekommunikationsgesellschaft mbHUnclassifiedIPv4 IPv668
AS6939Hurricane Electric LLCTransitIPv4 IPv659
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv68
AS6730Sunrise GmbHMobileIPv48
AS24482SG.GSHostingIPv4 IPv68
AS34019Hivane AssociationUnclassifiedIPv4 IPv68
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv68
AS48185team.blue NVUnclassifiedIPv4 IPv68
AS49432Dominic Schallert trading as schallert.com e.U.UnclassifiedIPv4 IPv68

All 19 upstreams →

Transit

Downstream networks

inferred

Networks for which AS57154 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS214410Stadtwerke Waldkirch GmbHUnclassifiedIPv4 IPv6221

Adjacency

Adjacent networks

All 22

Every AS seen directly next to AS57154 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS205112PHILUNET GmbHUnclassifiedIPv4 IPv6351
AS214410Stadtwerke Waldkirch GmbHUnclassifiedIPv4 IPv6221
AS60169R-KOM Regensburger Telekommunikationsgesellschaft mbHUnclassifiedIPv4 IPv6110
AS6939Hurricane Electric LLCTransitIPv4 IPv691
AS24482SG.GSHostingIPv4 IPv612
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv612
AS49432Dominic Schallert trading as schallert.com e.U.UnclassifiedIPv4 IPv612
AS213241TECHIT.BE SRLResidentialIPv4 IPv612
AS6730Sunrise GmbHMobileIPv410
AS12552GlobalConnect ABUnclassifiedIPv410

All 22 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.