asn.dev

Observed topology

AS13237 LAMBDANET-AS European Backbone of AS13237

Unclassified ARIN

Upstreams 34 carry this network
Downstreams 195 this network carries
Adjacent (IPv4) 233
Adjacent (IPv6) 100
Upstream graph Who carries AS13237, and who carries them, drawn as a map up to the transit-free core. 16 exchanges Where AS13237 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 34

Networks observed carrying traffic for AS13237: 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
AS1299Arelion Sweden ABTransitIPv4 IPv6579
AS6939Hurricane Electric LLCTransitIPv4 IPv6359
AS5405Inter.link GmbHUnclassifiedIPv4 IPv6275
AS3257GTT Communications Inc.TransitIPv4 IPv6184
AS34549meerfarbig GmbH & Co. KGHostingIPv472
AS3320Deutsche Telekom AGMobileIPv4 IPv648
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv644
AS24482SG.GSHostingIPv4 IPv644
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv644
AS42708Glesys ABUnclassifiedIPv4 IPv644

All 34 upstreams →

Transit

Downstream networks

All 195

Networks for which AS13237 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS44444Forcepoint UK LimitedHostingIPv4990
AS8391Knipp Medien und Kommunikation GmbHHostingIPv4 IPv6603
AS8569METRO Digital GmbHUnclassifiedIPv4 IPv6592
AS60380Michael Rottmann trading as Pixel X e.K.UnclassifiedIPv4 IPv6564
AS12886LEW TelNet GmbHResidentialIPv4 IPv6556
AS42442Adacor Hosting GmbHUnclassifiedIPv4 IPv6457
AS39923Unix-Solutions BVHostingIPv4 IPv6445
AS5587Itility LimitedResidentialIPv4 IPv6416
AS15486Materna Information & Communications SEUnclassifiedIPv4398
AS1987103U TELECOM GmbHUnclassifiedIPv4 IPv6397

All 195 downstreams →

Adjacency

Adjacent networks

All 239

Every AS seen directly next to AS13237 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv65,070
AS3257GTT Communications Inc.TransitIPv4 IPv62,261
AS6939Hurricane Electric LLCTransitIPv4 IPv62,217
AS34549meerfarbig GmbH & Co. KGHostingIPv41,811
AS5405Inter.link GmbHUnclassifiedIPv4 IPv61,771
AS50628Leonix Telecom SASUnclassifiedIPv4 IPv61,092
AS59919Brainbox S.r.l.ResidentialIPv41,033
AS44444Forcepoint UK LimitedHostingIPv4990
AS8391Knipp Medien und Kommunikation GmbHHostingIPv4 IPv6942
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv6848

All 239 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-30 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.49M 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.