asn.dev

Observed topology

AS5610 O2-CZECH-REPUBLIC O2 Czech Republic, a.s.

Unclassified RIPE Cable/DSL/ISP

Upstreams 11 carry this network
Downstreams 44 this network carries
Adjacent (IPv4) 55
Adjacent (IPv6) 24
Upstream graph Who carries AS5610, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS5610 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 11

Networks observed carrying traffic for AS5610: 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 IPv62,142
AS174Cogent Communications, LLCTransitIPv4 IPv6921
AS6939Hurricane Electric LLCTransitIPv4 IPv6782
AS24482SG.GSHostingIPv4 IPv672
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv672
AS1764Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbHUnclassifiedIPv4 IPv668
AS47232ISP Alliance a.s.ResidentialIPv458
AS6461Zayo BandwidthTransitIPv4 IPv623
AS202297Skylon Solutions LimitedUnclassifiedIPv4 IPv614
AS8218Zayo Infrastructure France SAUnclassifiedIPv413

All 11 upstreams →

Transit

Downstream networks

All 44

Networks for which AS5610 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS42908O2 Czech Republic, a.s.UnclassifiedIPv4 IPv62,389
AS16246O2 Czech Republic, a.s.UnclassifiedIPv4 IPv6841
AS206613Tipsport.net a.s.UnclassifiedIPv4 IPv6189
AS211274Quadruple a.s.UnclassifiedIPv4 IPv6187
AS35096Alef Nula a.s.UnclassifiedIPv4176
AS197353NN Management Services, s.r.o.UnclassifiedIPv4174
AS203411FORTUNA GAME a.s.UnclassifiedIPv4172
AS215711The Ministry of Agriculture of the Czech RepublicUnclassifiedIPv4 IPv6150
AS38952MAFRA, a.s.UnclassifiedIPv4118
AS204372PPF banka a.s.UnclassifiedIPv4116

All 44 downstreams →

Adjacency

Adjacent networks

All 55

Every AS seen directly next to AS5610 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv67,729
AS16246O2 Czech Republic, a.s.UnclassifiedIPv4 IPv65,037
AS174Cogent Communications, LLCTransitIPv4 IPv63,217
AS6939Hurricane Electric LLCTransitIPv4 IPv62,864
AS42908O2 Czech Republic, a.s.UnclassifiedIPv4 IPv62,477
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv6287
AS24482SG.GSHostingIPv4 IPv6269
AS202297Skylon Solutions LimitedUnclassifiedIPv4 IPv6200
AS206613Tipsport.net a.s.UnclassifiedIPv4 IPv6189
AS211274Quadruple a.s.UnclassifiedIPv4 IPv6187

All 55 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.