asn.dev

Observed topology

AS20904 Netplaza-AS Cinia Oy

Unclassified RIPE

Upstreams 6 carry this network
Downstreams 15 this network carries
Adjacent (IPv4) 21
Adjacent (IPv6) 11
Upstream graph Who carries AS20904, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS20904 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS20904: 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 IPv6602
AS174Cogent Communications, LLCTransitIPv4 IPv6300
AS6939Hurricane Electric LLCTransitIPv4 IPv6220
AS42708Glesys Sweden ABUnclassifiedIPv4 IPv622
AS50304Blix Solutions ASUnclassifiedIPv4 IPv622
AS12552GlobalConnect ABUnclassifiedIPv419

Transit

Downstream networks

All 15

Networks for which AS20904 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS208272VR-Group LtdUnclassifiedIPv4 IPv6664
AS51691F-Solutions OyUnclassifiedIPv4 IPv6214
AS60109F-Solutions OyUnclassifiedIPv4 IPv6205
AS206927Bittium Technologies OyUnclassifiedIPv4 IPv6190
AS2026IDDQD-ASUnclassifiedIPv4175
AS61990Vaisala OyjUnclassifiedIPv4 IPv6145
AS211215Fibernet Finland OyUnclassifiedIPv4 IPv6111
AS198118SGN Group OyUnclassifiedIPv457
AS213524Oulun Energia OyUnclassifiedIPv457
AS47983Cinia OyUnclassifiedIPv446

All 15 downstreams →

Adjacency

Adjacent networks

All 21

Every AS seen directly next to AS20904 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv61,548
AS174Cogent Communications, LLCTransitIPv4 IPv6818
AS208272VR-Group LtdUnclassifiedIPv4 IPv6664
AS6939Hurricane Electric LLCTransitIPv4 IPv6652
AS51691F-Solutions OyUnclassifiedIPv4 IPv6316
AS60109F-Solutions OyUnclassifiedIPv4 IPv6205
AS206927Bittium Technologies OyUnclassifiedIPv4 IPv6190
AS2026IDDQD-ASUnclassifiedIPv4175
AS61990Vaisala OyjUnclassifiedIPv4 IPv6145
AS211215Fibernet Finland OyUnclassifiedIPv4 IPv6111

All 21 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-14 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.46M 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.