asn.dev

Observed topology

AS31477 DUOCAST-AS Duocast B.V.

Hosting RIPE Content

Upstreams 31 carry this network
Downstreams 13 this network carries
Adjacent (IPv4) 39
Adjacent (IPv6) 24
Upstream graph Who carries AS31477, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS31477 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 31

Networks observed carrying traffic for AS31477: 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
AS1299Arelion Sweden ABTransitIPv4 IPv6700
AS6939Hurricane Electric LLCTransitIPv4 IPv6472
AS2914NTT America, Inc.TransitIPv4 IPv6325
AS50673Serverius Holding B.V.UnclassifiedIPv4 IPv6312
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv6241
AS24482SG.GSHostingIPv4 IPv650
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv650
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv649
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv649
AS48185team.blue NVUnclassifiedIPv4 IPv649

All 31 upstreams →

Transit

Downstream networks

All 13

Networks for which AS31477 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS8312Bas Smit trading as ZylonHostingIPv4 IPv6563
AS35974Quality Technology Services, LLCHostingIPv4118
AS39002XINDI Networks SRLUnclassifiedIPv4118
AS198508Plusine Systems B.V.HostingIPv4112
AS204751MobielWerkt B.V.UnclassifiedIPv4 IPv6105
AS51517Arend BrouwerHostingIPv486
AS29028DirectVPS B.V.HostingIPv4 IPv681
AS51923'Nothing But Air' Services B.V.UnclassifiedIPv632
AS213052Bram Wittendorp trading as BittenBytesHostingIPv4 IPv627
AS218916Fiscale Inlichtingen en Opsporingsdienst (FIOD)UnclassifiedIPv4 IPv625

All 13 downstreams →

Adjacency

Adjacent networks

All 44

Every AS seen directly next to AS31477 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv61,133
AS6939Hurricane Electric LLCTransitIPv4 IPv6640
AS2914NTT America, Inc.TransitIPv4 IPv6568
AS8312Bas Smit trading as ZylonHostingIPv4 IPv6563
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv6370
AS50673Serverius Holding B.V.UnclassifiedIPv4 IPv6335
AS51923'Nothing But Air' Services B.V.UnclassifiedIPv4 IPv6215
AS35974Quality Technology Services, LLCHostingIPv4118
AS39002XINDI Networks SRLUnclassifiedIPv4118
AS198508Plusine Systems B.V.HostingIPv4112

All 44 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.