asn.dev

Observed topology

AS25308 CITYLAN-AS CityLanCom LTD

Unclassified RIPE NSP

Upstreams 3 carry this network
Downstreams 2 this network carries
Adjacent (IPv4) 5
Adjacent (IPv6) 0
Upstream graph Who carries AS25308, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS25308 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS25308: 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
AS35598INETCOM CARRIER LLCUnclassifiedIPv41,432
AS28917Fiord Networks, UABUnclassifiedIPv4177
AS62255BiMajLink d.o.o.UnclassifiedIPv488

Transit

Downstream networks

inferred

Networks for which AS25308 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS208219FTI ROSTRANSMODERNIZATSIYAUnclassifiedIPv466
AS48371Westlan LTDResidentialIPv438

Adjacency

Adjacent networks

observed

Every AS seen directly next to AS25308 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS35598INETCOM CARRIER LLCUnclassifiedIPv41,627
AS28917Fiord Networks, UABUnclassifiedIPv4219
AS48371Westlan LTDResidentialIPv4173
AS62255BiMajLink d.o.o.UnclassifiedIPv490
AS208219FTI ROSTRANSMODERNIZATSIYAUnclassifiedIPv466

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.