asn.dev

Observed topology

AS34820 DANNAX-SK-AS www.dol.sk

Residential RIPE Cable/DSL/ISP

Upstreams 11 carry this network
Downstreams 4 this network carries
Adjacent (IPv4) 14
Adjacent (IPv6) 9
Upstream graph Who carries AS34820, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS34820 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 11

Networks observed carrying traffic for AS34820: 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
AS38949Trestel SK, a.s.UnclassifiedIPv4345
AS1299Arelion Sweden ABTransitIPv4 IPv6258
AS6939Hurricane Electric LLCTransitIPv613
AS24482SG.GSHostingIPv4 IPv611
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv611
AS37721Virtual Technologies & SolutionsResidentialIPv410
AS50629LWLcom GmbHUnclassifiedIPv410
AS3303Swisscom (Schweiz) AGResidentialIPv49
AS31230Slovak University of Technology in BratislavaUnclassifiedIPv63
AS33891Core-Backbone GmbHHostingIPv42

All 11 upstreams →

Transit

Downstream networks

inferred

Networks for which AS34820 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS201997MCOM-NET s.r.o.ResidentialIPv4 IPv6209
AS57547WIRIX, s.r.o.UnclassifiedIPv4168
AS57716Skynet Telecom s.r.o.UnclassifiedIPv459
AS202564ITcity s.r.o.ResidentialIPv634

Adjacency

Adjacent networks

All 16

Every AS seen directly next to AS34820 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv6475
AS38949Trestel SK, a.s.UnclassifiedIPv4471
AS201997MCOM-NET s.r.o.ResidentialIPv4 IPv6209
AS57547WIRIX, s.r.o.UnclassifiedIPv4168
AS6939Hurricane Electric LLCTransitIPv4 IPv691
AS57716Skynet Telecom s.r.o.UnclassifiedIPv459
AS202564ITcity s.r.o.ResidentialIPv634
AS24482SG.GSHostingIPv4 IPv621
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv621
AS37721Virtual Technologies & SolutionsResidentialIPv417

All 16 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-24 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 72.94M 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.