asn.dev

Observed topology

AS13237 LAMBDANET-AS euNetworks GmbH

Unclassified ARIN NSP

Upstreams 33 carry this network
Downstreams 194 this network carries
Adjacent (IPv4) 231
Adjacent (IPv6) 99
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 33

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 IPv6580
AS6939Hurricane Electric LLCTransitIPv4 IPv6358
AS5405Inter.link GmbHUnclassifiedIPv4 IPv6282
AS3257GTT Communications Inc.TransitIPv4 IPv6154
AS34549meerfarbig GmbH & Co. KGHostingIPv472
AS3320Deutsche Telekom AGMobileIPv4 IPv648
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv644
AS24482SG.GSHostingIPv4 IPv644
AS34019Hivane AssociationUnclassifiedIPv4 IPv644
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv644

All 33 upstreams →

Transit

Downstream networks

All 194

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 IPv6569
AS60380Michael Rottmann trading as Pixel X e.K.UnclassifiedIPv4 IPv6544
AS8569METRO Digital GmbHUnclassifiedIPv4 IPv6526
AS12886LEW TelNet GmbHResidentialIPv4 IPv6506
AS42442Adacor Hosting GmbHUnclassifiedIPv4 IPv6441
AS39923Unix-Solutions BVHostingIPv4 IPv6424
AS1987103U TELECOM GmbHUnclassifiedIPv4 IPv6382
AS5587Itility LimitedResidentialIPv4 IPv6376
AS15486Materna Information & Communications SEUnclassifiedIPv4375

All 194 downstreams →

Adjacency

Adjacent networks

All 238

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

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv64,907
AS6939Hurricane Electric LLCTransitIPv4 IPv62,196
AS3257GTT Communications Inc.TransitIPv4 IPv61,956
AS34549meerfarbig GmbH & Co. KGHostingIPv41,805
AS5405Inter.link GmbHUnclassifiedIPv4 IPv61,790
AS50628Leonix Telecom SASUnclassifiedIPv4 IPv61,074
AS59919Brainbox S.r.l.ResidentialIPv4999
AS44444Forcepoint UK LimitedHostingIPv4990
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv6849
AS42708Glesys Sweden ABUnclassifiedIPv4 IPv6732

All 238 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M 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.