asn.dev

Observed topology

AS20811 BRENNERCOM-AS

Unclassified APNIC

Upstreams 7 carry this network
Downstreams 12 this network carries
Adjacent (IPv4) 19
Adjacent (IPv6) 12
Upstream graph Who carries AS20811, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS20811 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS20811: 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
AS28716Retelit Digital Services S.p.A.UnclassifiedIPv4 IPv6619
AS6939Hurricane Electric LLCTransitIPv4 IPv6157
AS9002RETN LimitedUnclassifiedIPv465
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv616
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv615
AS59919Brainbox S.r.l.ResidentialIPv413
AS13030Init7 (Switzerland) Ltd.HostingIPv62

Transit

Downstream networks

All 12

Networks for which AS20811 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS49265Cooperativa Sociale Galileo A.r.l.UnclassifiedIPv4328
AS59419Sidera ICTease S.r.l.UnclassifiedIPv4 IPv6307
AS213123ALPERIA SPAUnclassifiedIPv4174
AS207146Netikom SRLResidentialIPv4 IPv6128
AS51344IDM Suedtirol Alto AdigeUnclassifiedIPv4 IPv691
AS56346Leitner S.P.A.UnclassifiedIPv467
AS31067SEAC S.p.A.UnclassifiedIPv444
AS211723Peter PohlUnclassifiedIPv633
AS50178Limitis s.r.l.UnclassifiedIPv4 IPv617
AS57469Azienda Pubbliservizi BrunicoUnclassifiedIPv416

All 12 downstreams →

Adjacency

Adjacent networks

All 21

Every AS seen directly next to AS20811 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS28716Retelit Digital Services S.p.A.UnclassifiedIPv4 IPv61,409
AS6939Hurricane Electric LLCTransitIPv4 IPv6408
AS49265Cooperativa Sociale Galileo A.r.l.UnclassifiedIPv4328
AS59419Sidera ICTease S.r.l.UnclassifiedIPv4 IPv6307
AS213123ALPERIA SPAUnclassifiedIPv4174
AS9002RETN LimitedUnclassifiedIPv4162
AS207146Netikom SRLResidentialIPv4 IPv6128
AS51344IDM Suedtirol Alto AdigeUnclassifiedIPv4 IPv691
AS56346Leitner S.P.A.UnclassifiedIPv467
AS31067SEAC S.p.A.UnclassifiedIPv444

All 21 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M 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.