asn.dev

Observed topology

AS209870 Cylo Cylo Ltd

Hosting RIPE Content

Upstreams 23 carry this network
Downstreams 0 this network carries
Adjacent (IPv4) 19
Adjacent (IPv6) 9
Upstream graph Who carries AS209870, and who carries them, drawn as a map up to the transit-free core. 7 exchanges Where AS209870 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 23

Networks observed carrying traffic for AS209870: 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
AS43861Circle B B.V.UnclassifiedIPv467
AS6939Hurricane Electric LLCTransitIPv4 IPv628
AS174Cogent Communications, LLCTransitIPv48
AS24482SG.GSHostingIPv4 IPv63
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv63
AS58057Securebit AGUnclassifiedIPv4 IPv63
AS208972GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETIUnclassifiedIPv4 IPv63
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv42
AS12552GlobalConnect ABUnclassifiedIPv42
AS12779IT.Gate S.p.A.UnclassifiedIPv42

All 23 upstreams →

Transit

Downstream networks

inferred

Networks for which AS209870 was observed as the last hop before the origin, meaning it appears to provide them transit.

No downstream observed. This network does not appear to carry transit for anyone.

Adjacency

Adjacent networks

All 23

Every AS seen directly next to AS209870 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS43861Circle B B.V.UnclassifiedIPv467
AS6939Hurricane Electric LLCTransitIPv4 IPv628
AS174Cogent Communications, LLCTransitIPv48
AS24482SG.GSHostingIPv4 IPv63
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv63
AS58057Securebit AGUnclassifiedIPv4 IPv63
AS208972GIBIRNET ILETISIM HIZMETLERI SANAYI VE TICARET LIMITED SIRKETIUnclassifiedIPv4 IPv63
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv42
AS12552GlobalConnect ABUnclassifiedIPv42
AS12779IT.Gate S.p.A.UnclassifiedIPv42

All 23 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-01 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.48M 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.