asn.dev

Upstream networks

AS51561 AS-ICUK

Unclassified RIPE NSP

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS51561: 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
AS174Cogent Communications, LLCTransitIPv4 IPv6830
AS13335Cloudflare, Inc.HostingIPv4773
AS2914NTT America, Inc.TransitIPv4 IPv6764
AS3356Level 3 Parent, LLCTransitIPv4 IPv6764
AS6939Hurricane Electric LLCTransitIPv4 IPv6486
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6133
AS50304Blix Solutions ASUnclassifiedIPv487
AS24482SG.GSHostingIPv4 IPv658
AS48185team.blue NVUnclassifiedIPv4 IPv658
AS50300CustodianDC LimitedUnclassifiedIPv4 IPv658
AS33891Core-Backbone GmbHHostingIPv454
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv645
AS12552GlobalConnect ABUnclassifiedIPv444
AS3216PJSC "Vimpelcom"MobileIPv443
AS3741Dimension DataUnclassifiedIPv443
AS4657StarHub LtdResidentialIPv443
AS12779IT.Gate S.p.A.UnclassifiedIPv443
AS17639Converge ICT Solutions Inc.UnclassifiedIPv443
AS37721Virtual Technologies & SolutionsResidentialIPv443
AS37100SEACOM LimitedUnclassifiedIPv441
AS9002RETN LimitedUnclassifiedIPv61
AS25091IP-Max SAUnclassifiedIPv61
AS31500Global Network Management IncUnclassifiedIPv41
AS213241TECHIT.BE SRLResidentialIPv61

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.

Derived from routing tables collected at 2026-10-29 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.36M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.