asn.dev

Observed topology

AS13037 ZEN-AS Zen Internet Ltd

Residential RIPE

Upstreams 17 carry this network
Downstreams 3 this network carries
Adjacent (IPv4) 19
Adjacent (IPv6) 11
Upstream graph Who carries AS13037, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS13037 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 17

Networks observed carrying traffic for AS13037: 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 IPv6637
AS6461Zayo BandwidthTransitIPv4 IPv6365
AS6939Hurricane Electric LLCTransitIPv4 IPv6348
AS2914NTT America, Inc.TransitIPv4 IPv6263
AS9002RETN LimitedUnclassifiedIPv4 IPv6188
AS33891Core-Backbone GmbHHostingIPv474
AS24482SG.GSHostingIPv4 IPv638
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv638
AS42708Glesys Sweden ABUnclassifiedIPv4 IPv638
AS48185team.blue NVUnclassifiedIPv4 IPv638

All 17 upstreams →

Transit

Downstream networks

inferred

Networks for which AS13037 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS208697Kellogg Management Services (Europe) LimitedUnclassifiedIPv472
AS51766Merseyside Fire and Rescue ServiceUnclassifiedIPv459
AS44697Computer & Communication Co. LimitedUnclassifiedIPv429

Adjacency

Adjacent networks

All 20

Every AS seen directly next to AS13037 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv6656
AS6461Zayo BandwidthTransitIPv4 IPv6413
AS6939Hurricane Electric LLCTransitIPv4 IPv6365
AS2914NTT America, Inc.TransitIPv4 IPv6279
AS9002RETN LimitedUnclassifiedIPv4 IPv6200
AS33891Core-Backbone GmbHHostingIPv481
AS208697Kellogg Management Services (Europe) LimitedUnclassifiedIPv472
AS51766Merseyside Fire and Rescue ServiceUnclassifiedIPv459
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv643
AS42708Glesys Sweden ABUnclassifiedIPv4 IPv643

All 20 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-09 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.03M 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.