asn.dev

Observed topology

AS23520 LIBERTY-NETWORKS - Columbus Networks USA, Inc.

Residential ARIN NSP

Upstreams 8 carry this network
Downstreams 183 this network carries
Adjacent (IPv4) 197
Adjacent (IPv6) 126
Upstream graph Who carries AS23520, and who carries them, drawn as a map up to the transit-free core. 6 exchanges Where AS23520 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS23520: 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 IPv62,584
AS174Cogent Communications, LLCTransitIPv4 IPv61,701
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv6896
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv6719
AS3257GTT Communications Inc.TransitIPv4 IPv6279
AS3303Swisscom (Schweiz) AGResidentialIPv4120
AS6939Hurricane Electric LLCTransitIPv454
AS7195EDGEUNO S.A.SUnclassifiedIPv62

Transit

Downstream networks

All 183

Networks for which AS23520 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS14638Liberty Communications of Puerto Rico LLCUnclassifiedIPv4 IPv632,663
AS21826Corporacion Telemic C.A.UnclassifiedIPv4 IPv626,144
AS8048CANTV Servicios, VenezuelaResidentialIPv4 IPv618,250
AS11139Cable & Wireless DominicaResidentialIPv4 IPv616,749
AS262191LIBERTY NETWORKS DE COLOMBIA S.A.SUnclassifiedIPv4 IPv615,727
AS11556Cable & Wireless PanamaResidentialIPv4 IPv615,068
AS14813Columbus Telecommunications (Barbados) LimitedUnclassifiedIPv4 IPv613,668
AS30689FLOWUnclassifiedIPv4 IPv611,393
AS52228Cable TicaUnclassifiedIPv4 IPv610,178
AS27775Telecommunicationcompany Suriname - TeleSurResidentialIPv4 IPv69,042

All 183 downstreams →

Adjacency

Adjacent networks

All 199

Every AS seen directly next to AS23520 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv6209,538
AS174Cogent Communications, LLCTransitIPv4 IPv6115,152
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv688,186
AS6762TELECOM ITALIA SPARKLE S.p.A.TransitIPv4 IPv654,630
AS14638Liberty Communications of Puerto Rico LLCUnclassifiedIPv4 IPv634,636
AS21826Corporacion Telemic C.A.UnclassifiedIPv4 IPv634,550
AS262191LIBERTY NETWORKS DE COLOMBIA S.A.SUnclassifiedIPv4 IPv627,154
AS52468UFINET PANAMA S.A.UnclassifiedIPv4 IPv622,887
AS8048CANTV Servicios, VenezuelaResidentialIPv4 IPv622,596
AS272935GB TELECORP DOMINICANA, S.R.LUnclassifiedIPv4 IPv622,264

All 199 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.