asn.dev

Observed topology

AS12338 EUSKALTEL

Mobile RIPE Cable/DSL/ISP

Upstreams 3 carry this network
Downstreams 12 this network carries
Adjacent (IPv4) 14
Adjacent (IPv6) 4
Upstream graph Who carries AS12338, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS12338 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS12338: 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
AS15704XTRA TELECOM S.A.ResidentialIPv4 IPv64,646
AS174Cogent Communications, LLCTransitIPv4 IPv6923
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv6704

Transit

Downstream networks

All 12

Networks for which AS12338 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS15704XTRA TELECOM S.A.ResidentialIPv4 IPv6334
AS202765DATA CENTER EUSKADI SOCIEDAD LIMITADAUnclassifiedIPv4177
AS13195Ingenieria y Economia del Transporte, S.AUnclassifiedIPv4 IPv679
AS15711Iberdrola S.A.UnclassifiedIPv474
AS35700Bilbao Bizkaia KutxaUnclassifiedIPv459
AS39353Gobierno del Principado de AsturiasUnclassifiedIPv459
AS212536Nexis Tecnologias de la Informacion, S.LUnclassifiedIPv458
AS48187ARABAKO FORU ALDUNDIA / DIPUTACION FORAL DE ALAVAUnclassifiedIPv455
AS12319Informatika Zerbitzuen Foru Elkartea Sociedad Foral de Servicios Informaticos SAUnclassifiedIPv446
AS200518EUSKAL KIROL APOSTUAK SOCIEDAD ANONIMAUnclassifiedIPv436

All 12 downstreams →

Adjacency

Adjacent networks

All 14

Every AS seen directly next to AS12338 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS15704XTRA TELECOM S.A.ResidentialIPv4 IPv65,074
AS174Cogent Communications, LLCTransitIPv4 IPv61,464
AS6453TATA COMMUNICATIONS (AMERICA) INCTransitIPv4 IPv61,084
AS202765DATA CENTER EUSKADI SOCIEDAD LIMITADAUnclassifiedIPv4177
AS13195Ingenieria y Economia del Transporte, S.AUnclassifiedIPv4 IPv679
AS15711Iberdrola S.A.UnclassifiedIPv474
AS35700Bilbao Bizkaia KutxaUnclassifiedIPv459
AS39353Gobierno del Principado de AsturiasUnclassifiedIPv459
AS212536Nexis Tecnologias de la Informacion, S.LUnclassifiedIPv458
AS48187ARABAKO FORU ALDUNDIA / DIPUTACION FORAL DE ALAVAUnclassifiedIPv455

All 14 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M 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.