asn.dev

Observed topology

AS28952 O2BSSK O2 Business Services, a.s

Unclassified RIPE

Upstreams 9 carry this network
Downstreams 7 this network carries
Adjacent (IPv4) 15
Adjacent (IPv6) 10
Upstream graph Who carries AS28952, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS28952 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS28952: 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
AS174Cogent Communications, LLCTransitIPv4 IPv6350
AS6939Hurricane Electric LLCTransitIPv4 IPv6116
AS5610O2 Czech Republic, a.s.UnclassifiedIPv4 IPv665
AS31230Slovak University of Technology in BratislavaUnclassifiedIPv4 IPv612
AS24482SG.GSHostingIPv4 IPv611
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv611
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv611
AS3303Swisscom (Schweiz) AGResidentialIPv49
AS20562Broadband Hosting B.V.HostingIPv49

Transit

Downstream networks

inferred

Networks for which AS28952 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS60715Lombard s.r.o.UnclassifiedIPv4228
AS25496ZT BratislavaUnclassifiedIPv4 IPv682
AS57414eustream asUnclassifiedIPv458
AS204691PLAYMAX s.r.o.UnclassifiedIPv457
AS205055Geetoo Technology SK s. r. o.UnclassifiedIPv612
AS49659SkyToll, a. s.UnclassifiedIPv41
AS60890CentralNic LtdUnclassifiedIPv41

Adjacency

Adjacent networks

All 16

Every AS seen directly next to AS28952 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv6649
AS60715Lombard s.r.o.UnclassifiedIPv4228
AS6939Hurricane Electric LLCTransitIPv4 IPv6179
AS5610O2 Czech Republic, a.s.UnclassifiedIPv4 IPv6109
AS25496ZT BratislavaUnclassifiedIPv4 IPv682
AS57414eustream asUnclassifiedIPv458
AS204691PLAYMAX s.r.o.UnclassifiedIPv457
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv622
AS24482SG.GSHostingIPv4 IPv617
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv617

All 16 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-08 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.00M 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.