asn.dev

Observed topology

AS766 REDIRIS RedIRIS Autonomous System

Upstreams 10 carry this network
Downstreams 21 this network carries
Adjacent (IPv4) 30
Adjacent (IPv6) 19

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS766: 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
AS21320GEANT VerenigingUnclassifiedIPv4 IPv6612
AS3356Level 3 Parent, LLCTransitIPv4 IPv6370
AS6939Hurricane Electric LLCTransitIPv4 IPv6299
AS9002RETN LimitedUnclassifiedIPv4180
AS174Cogent Communications, LLCTransitIPv4 IPv6179
AS20965GEANT VerenigingUnclassifiedIPv4 IPv6159
AS3303Swisscom (Schweiz) AGResidentialIPv460
AS33891Core-Backbone GmbHHostingIPv460
AS37721Virtual Technologies & SolutionsResidentialIPv430
AS29632Netassist International EOODUnclassifiedIPv64

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.

Transit

Downstream networks

inferred

Networks for which AS766 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS200521Ministerio de Transformacion Digital y de la Funcion PublicaUnclassifiedIPv4 IPv62,780
AS13041Consorci de Serveis Universitaris de CatalunyaUnclassifiedIPv4 IPv6439
AS288European Space Agency (ESA)UnclassifiedIPv4427
AS34511Fundacion IntegraUnclassifiedIPv4 IPv6343
AS197829Gobierno de NavarraUnclassifiedIPv4296
AS44593Fundacion Centro de Supercomputacion de Castilla y LeonUnclassifiedIPv4 IPv6165
AS198096Junta de AndaluciaUnclassifiedIPv4 IPv6159
AS214516Fundacion Universitaria San Pablo-CEUUnclassifiedIPv6152
AS34285Sociedad Andaluza para el Desarrollo de las Telecomunicaciones S.A. Medio PropioUnclassifiedIPv4122
AS49851Aragonesa de Servicios TelematicosUnclassifiedIPv4122
AS15630UNEDUnclassifiedIPv4 IPv6100
AS198853Fundacion ikerbasqueUnclassifiedIPv4 IPv699
AS25354Entidad Publica Empresarial Red.esUnclassifiedIPv4 IPv679
AS208597NAVARRA DE SERVICIOS Y TECNOLOGIAS S.A.UnclassifiedIPv4 IPv678
AS210158AGENCIA PARA LA ADMINITRACION DIGITAL DE LA COMUNIDAD DE MADRIDUnclassifiedIPv467
AS205580European Fisheries Control AgencyUnclassifiedIPv461
AS15488Euskal Herriko UnibertsitateaUnclassifiedIPv461
AS43697Govern de les Illes BalearsUnclassifiedIPv461
AS198878Universidad de NavarraUnclassifiedIPv461
AS2114ESCUELAS DE ESTUDIOS SUPERIORES ESIC SACERDOTES DEL CORAZON DE JESUS PADRES REPARADORESUnclassifiedIPv449
AS25285Boletin Oficial del EstadoUnclassifiedIPv419

Adjacency

Adjacent networks

49 shown

Every AS seen directly next to AS766 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS200521Ministerio de Transformacion Digital y de la Funcion PublicaUnclassifiedIPv4 IPv62,780
AS21320GEANT VerenigingUnclassifiedIPv4 IPv62,522
AS6939Hurricane Electric LLCTransitIPv4 IPv61,531
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,374
AS9002RETN LimitedUnclassifiedIPv4 IPv6829
AS20965GEANT VerenigingUnclassifiedIPv4 IPv6719
AS13041Consorci de Serveis Universitaris de CatalunyaUnclassifiedIPv4 IPv6690
AS174Cogent Communications, LLCTransitIPv4 IPv6551
AS288European Space Agency (ESA)UnclassifiedIPv4427
AS34511Fundacion IntegraUnclassifiedIPv4 IPv6343
AS197829Gobierno de NavarraUnclassifiedIPv4296
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv6265
AS33891Core-Backbone GmbHHostingIPv4252
AS198853Fundacion ikerbasqueUnclassifiedIPv4 IPv6243
AS198096Junta de AndaluciaUnclassifiedIPv4 IPv6235
AS44593Fundacion Centro de Supercomputacion de Castilla y LeonUnclassifiedIPv4 IPv6226
AS214516Fundacion Universitaria San Pablo-CEUUnclassifiedIPv6152
AS37721Virtual Technologies & SolutionsResidentialIPv4139
AS34285Sociedad Andaluza para el Desarrollo de las Telecomunicaciones S.A. Medio PropioUnclassifiedIPv4122
AS49851Aragonesa de Servicios TelematicosUnclassifiedIPv4122
AS15630UNEDUnclassifiedIPv4 IPv6100
AS25354Entidad Publica Empresarial Red.esUnclassifiedIPv4 IPv679
AS208597NAVARRA DE SERVICIOS Y TECNOLOGIAS S.A.UnclassifiedIPv4 IPv678
AS210158AGENCIA PARA LA ADMINITRACION DIGITAL DE LA COMUNIDAD DE MADRIDUnclassifiedIPv467
AS15488Euskal Herriko UnibertsitateaUnclassifiedIPv461
AS43697Govern de les Illes BalearsUnclassifiedIPv461
AS198878Universidad de NavarraUnclassifiedIPv461
AS205580European Fisheries Control AgencyUnclassifiedIPv461
AS2114ESCUELAS DE ESTUDIOS SUPERIORES ESIC SACERDOTES DEL CORAZON DE JESUS PADRES REPARADORESUnclassifiedIPv449
AS29632Netassist International EOODUnclassifiedIPv631
AS25285Boletin Oficial del EstadoUnclassifiedIPv419
AS13030Init7 (Switzerland) Ltd.HostingIPv68
AS35280F5 Networks SARLHostingIPv44

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.

Interconnection

Exchange presence

recorded

Internet exchanges where Packet Clearing House has a port recorded for AS766, largest fabric first. An exchange is shared switching where networks interconnect directly rather than paying a transit provider to carry traffic between them, so turning up at one is a deliberate choice about how this network wants to be reached. Each name opens that exchange's own page, with its peering LANs and every other network recorded on it. Recorded at 3 exchanges across 2 countries and 1 region.

ExchangeLocationTheir addressMember ports
ESpanix Madrid Lower LANMadrid, Spain193.149.1.26177
Gigabit Portuguese Internet Exchange PointLisbon, Portugal193.136.250.3561
Catalunya Neutral Internet Exchange PointBarcelona, Spain193.242.98.1956

Unlike the tables above, this is recorded rather than inferred. An address on a peering LAN is at that exchange by definition. Two carve-outs all the same. Member ports counts every participant at the exchange, not this network's ports, so read it as a size proxy. And an absent exchange means PCH has no record of it, not that the network is not there.

Provenance

Where this comes from

Derived from routing tables collected at 2026-08-08 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.02M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.

Exchange presence comes from a separate dataset: the directory collected 2026-08-09 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,327 exchanges and 93,164 recorded member ports, licensed CC BY-NC-SA 3.0.

PeeringDB is the better-known directory and is deliberately not the source here: its acceptable-use policy forbids the bulk storage this needs. The two answer different questions anyway. PeeringDB reports what an operator declares about itself; this reports what PCH has recorded.