asn.dev

Observed topology

AS15623 CYBERLINK Cyberlink AG

Unclassified RIPE

Upstreams 14 carry this network
Downstreams 22 this network carries
Adjacent (IPv4) 36
Adjacent (IPv6) 18
Upstream graph Who carries AS15623, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS15623 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 14

Networks observed carrying traffic for AS15623: 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
AS5405Inter.link GmbHUnclassifiedIPv4 IPv6473
AS4455IX Reach LtdUnclassifiedIPv4 IPv6439
AS6939Hurricane Electric LLCTransitIPv4 IPv6312
AS1299Arelion Sweden ABTransitIPv4 IPv6306
AS3356Level 3 Parent, LLCTransitIPv4288
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv6264
AS174Cogent Communications, LLCTransitIPv4 IPv6150
AS24482SG.GSHostingIPv4 IPv642
AS34019Hivane AssociationUnclassifiedIPv4 IPv642
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv642

All 14 upstreams →

Transit

Downstream networks

All 22

Networks for which AS15623 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS35712AMAG Corporate Services AGUnclassifiedIPv4162
AS51529UPGREAT AGUnclassifiedIPv4 IPv6160
AS50805EBP Schweiz AGUnclassifiedIPv4118
AS43291Achermann ict-services AGUnclassifiedIPv4 IPv6110
AS28928Schwyzer KantonalbankUnclassifiedIPv4100
AS51106ti&m AGUnclassifiedIPv4 IPv697
AS51786Patrick VelderUnclassifiedIPv4 IPv697
AS214060Daetwyler IT Infra AGUnclassifiedIPv495
AS61232redIT Services AGHostingIPv4 IPv676
AS6732Cyberlink AGUnclassifiedIPv463

All 22 downstreams →

Adjacency

Adjacent networks

All 37

Every AS seen directly next to AS15623 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS4455IX Reach LtdUnclassifiedIPv4 IPv6768
AS5405Inter.link GmbHUnclassifiedIPv4 IPv6742
AS3356Level 3 Parent, LLCTransitIPv4543
AS1299Arelion Sweden ABTransitIPv4 IPv6491
AS6939Hurricane Electric LLCTransitIPv4 IPv6479
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv6467
AS174Cogent Communications, LLCTransitIPv4 IPv6262
AS35712AMAG Corporate Services AGUnclassifiedIPv4162
AS51529UPGREAT AGUnclassifiedIPv4 IPv6160
AS50805EBP Schweiz AGUnclassifiedIPv4118

All 37 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.