asn.dev

Observed topology

AS203446 AS203446 SMARTNET Germany GmbH

Unclassified RIPE

Upstreams 26 carry this network
Downstreams 27 this network carries
Adjacent (IPv4) 55
Adjacent (IPv6) 36
Upstream graph Who carries AS203446, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS203446 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 26

Networks observed carrying traffic for AS203446: 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
AS3257GTT Communications Inc.TransitIPv4 IPv6236
AS6461Zayo BandwidthTransitIPv4 IPv6190
AS6939Hurricane Electric LLCTransitIPv4 IPv6182
AS174Cogent Communications, LLCTransitIPv4 IPv6178
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv661
AS5511Orange S.A.TransitIPv4 IPv659
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv654
AS24482SG.GSHostingIPv4 IPv622
AS34019Hivane AssociationUnclassifiedIPv4 IPv622
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv622

All 26 upstreams →

Transit

Downstream networks

All 27

Networks for which AS203446 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS58087Florian KolbUnclassifiedIPv4 IPv62,083
AS400992ZhouyiSat CommunicationsUnclassifiedIPv4 IPv6774
AS215730FZCOUnclassifiedIPv4 IPv6706
AS403005BlatantUnclassifiedIPv4542
AS213905ISPLABS LIMITEDUnclassifiedIPv4 IPv6348
AS401626Netiface America, Inc.HostingIPv4 IPv6274
AS214243Marc FischerUnclassifiedIPv4 IPv6250
AS208226Ouiheberg SARLUnclassifiedIPv4 IPv6215
AS214279DASABO OUHostingIPv4 IPv6194
AS197761Elkin Semyon YuryevichUnclassifiedIPv4 IPv6186

All 27 downstreams →

Adjacency

Adjacent networks

All 59

Every AS seen directly next to AS203446 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS58087Florian KolbUnclassifiedIPv4 IPv62,330
AS3257GTT Communications Inc.TransitIPv4 IPv62,297
AS6939Hurricane Electric LLCTransitIPv4 IPv61,763
AS6461Zayo BandwidthTransitIPv4 IPv61,645
AS174Cogent Communications, LLCTransitIPv4 IPv61,443
AS400992ZhouyiSat CommunicationsUnclassifiedIPv4 IPv61,347
AS215730FZCOUnclassifiedIPv4 IPv61,214
AS19721391TELECOM LTDUnclassifiedIPv4861
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6654
AS5511Orange S.A.TransitIPv4 IPv6649

All 59 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.