asn.dev

Observed topology

AS35228 O2BROADBAND Telefonica UK Limited

Residential RIPE

Upstreams 21 carry this network
Downstreams 4 this network carries
Adjacent (IPv4) 24
Adjacent (IPv6) 13
Upstream graph Who carries AS35228, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS35228 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 21

Networks observed carrying traffic for AS35228: 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
AS5089Virgin Media LimitedResidentialIPv4 IPv66,840
AS12956TELEFONICA GLOBAL SOLUTIONS SLTransitIPv4 IPv6520
AS3257GTT Communications Inc.TransitIPv4 IPv655
AS6939Hurricane Electric LLCTransitIPv4 IPv653
AS9002RETN LimitedUnclassifiedIPv4 IPv622
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv617
AS33891Core-Backbone GmbHHostingIPv410
AS50304Blix Solutions ASUnclassifiedIPv410
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv66
AS24482SG.GSHostingIPv4 IPv66

All 21 upstreams →

Transit

Downstream networks

inferred

Networks for which AS35228 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS29180Telefonica UK LimitedUnclassifiedIPv41,355
AS39060Sainsbury's Supermarkets LtdUnclassifiedIPv459
AS57850Northumbrian Water LtdUnclassifiedIPv459
AS50063Sainsbury's Supermarkets LtdUnclassifiedIPv458

Adjacency

Adjacent networks

All 25

Every AS seen directly next to AS35228 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS5089Virgin Media LimitedResidentialIPv4 IPv67,427
AS29180Telefonica UK LimitedUnclassifiedIPv41,355
AS12956TELEFONICA GLOBAL SOLUTIONS SLTransitIPv4 IPv6952
AS6939Hurricane Electric LLCTransitIPv4 IPv6181
AS9002RETN LimitedUnclassifiedIPv4 IPv686
AS3257GTT Communications Inc.TransitIPv4 IPv671
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv665
AS39060Sainsbury's Supermarkets LtdUnclassifiedIPv459
AS57850Northumbrian Water LtdUnclassifiedIPv459
AS50063Sainsbury's Supermarkets LtdUnclassifiedIPv458

All 25 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M 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.