asn.dev

Observed topology

AS5089 NTL

Residential RIPE Cable/DSL/ISP

Upstreams 8 carry this network
Downstreams 57 this network carries
Adjacent (IPv4) 65
Adjacent (IPv6) 5
Upstream graph Who carries AS5089, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS5089 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS5089: 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
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv69,411
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,829
AS33891Core-Backbone GmbHHostingIPv4643
AS2914NTT America, Inc.TransitIPv4 IPv6631
AS12779IT.Gate S.p.A.UnclassifiedIPv4284
AS48185team.blue NVUnclassifiedIPv4284
AS50300CustodianDC LimitedUnclassifiedIPv4284
AS12956TELEFONICA GLOBAL SOLUTIONS SLTransitIPv4 IPv692

Transit

Downstream networks

All 57

Networks for which AS5089 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS35228Telefonica UK LimitedResidentialIPv4 IPv66,963
AS49318Telefonica Tech UK LimitedUnclassifiedIPv4900
AS211124CGI France SASUnclassifiedIPv4671
AS44403Bristol City CouncilUnclassifiedIPv4233
AS49324Nottingham City CouncilUnclassifiedIPv4180
AS34344Port Of Tilbury London LtdUnclassifiedIPv4171
AS205693Driver & Vehicle Licensing AgencyUnclassifiedIPv4134
AS14931The St. Paul Travelers Companies, Inc.UnclassifiedIPv4130
AS60851Egton Medical Information Systems LimitedUnclassifiedIPv4122
AS203652IBM United Kingdom LimitedUnclassifiedIPv4122

All 57 downstreams →

Adjacency

Adjacent networks

All 65

Every AS seen directly next to AS5089 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv613,080
AS35228Telefonica UK LimitedResidentialIPv4 IPv67,561
AS12956TELEFONICA GLOBAL SOLUTIONS SLTransitIPv4 IPv67,073
AS3356Level 3 Parent, LLCTransitIPv4 IPv62,383
AS33891Core-Backbone GmbHHostingIPv41,103
AS2914NTT America, Inc.TransitIPv4 IPv6905
AS49318Telefonica Tech UK LimitedUnclassifiedIPv4900
AS211124CGI France SASUnclassifiedIPv4671
AS48185team.blue NVUnclassifiedIPv4524
AS50300CustodianDC LimitedUnclassifiedIPv4488

All 65 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-30 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.49M 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.