asn.dev

Observed topology

AS12912 TM

Unclassified RIPE Cable/DSL/ISP

Upstreams 17 carry this network
Downstreams 204 this network carries
Adjacent (IPv4) 217
Adjacent (IPv6) 34
Upstream graph Who carries AS12912, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS12912 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 17

Networks observed carrying traffic for AS12912: 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
AS3320Deutsche Telekom AGMobileIPv4 IPv6996
AS1299Arelion Sweden ABTransitIPv4 IPv6738
AS33891Core-Backbone GmbHHostingIPv4 IPv6446
AS6939Hurricane Electric LLCTransitIPv4 IPv6400
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6117
AS24482SG.GSHostingIPv4 IPv649
AS34019Hivane AssociationUnclassifiedIPv4 IPv630
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv630
AS212024Marc SchmittUnclassifiedIPv4 IPv630
AS6797GlobalConnect ABUnclassifiedIPv429

All 17 upstreams →

Transit

Downstream networks

All 204

Networks for which AS12912 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS42763FPUH Czajen Krzysztof CzajaResidentialIPv4708
AS61154IDHosting Sp. z o. o.HostingIPv4622
AS30851Sileman Sp. z o.o.UnclassifiedIPv4489
AS50599DATASPACE P.S.A.UnclassifiedIPv4419
AS15391Sysclay Sp. z o. o.HostingIPv4 IPv6404
AS60448Damian Giecko "COVERNET"UnclassifiedIPv4300
AS51323Polska Wytwornia Papierow Wartosciowych S.A.UnclassifiedIPv4252
AS34254HOR.NET Polska Sp.z o.o.UnclassifiedIPv4 IPv6249
AS56391VIRTUAL TELECOM SP. Z O.O.UnclassifiedIPv4214
AS203845Tide Software Sp. z o.o.UnclassifiedIPv4196

All 204 downstreams →

Adjacency

Adjacent networks

All 224

Every AS seen directly next to AS12912 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS33891Core-Backbone GmbHHostingIPv4 IPv65,493
AS1299Arelion Sweden ABTransitIPv4 IPv64,781
AS3320Deutsche Telekom AGMobileIPv4 IPv62,005
AS6939Hurricane Electric LLCTransitIPv4 IPv61,520
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv61,072
AS30851Sileman Sp. z o.o.UnclassifiedIPv4821
AS42763FPUH Czajen Krzysztof CzajaResidentialIPv4759
AS61154IDHosting Sp. z o. o.HostingIPv4622
AS48464Futuro Exito Sp. z o.o.ResidentialIPv4 IPv6538
AS50599DATASPACE P.S.A.UnclassifiedIPv4419

All 224 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-12 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.21M 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.