asn.dev

Observed topology

AS43623 ARD-STERNPUNKT ARD-Kommunikationsnetze

Hosting RIPE

Upstreams 18 carry this network
Downstreams 8 this network carries
Adjacent (IPv4) 24
Adjacent (IPv6) 13
Upstream graph Who carries AS43623, and who carries them, drawn as a map up to the transit-free core. 4 exchanges Where AS43623 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 18

Networks observed carrying traffic for AS43623: 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 IPv6479
AS88811&1 Versatel GmbHResidentialIPv4 IPv6410
AS6939Hurricane Electric LLCTransitIPv4 IPv6257
AS3209Vodafone GmbHResidentialIPv486
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv680
AS24482SG.GSHostingIPv4 IPv628
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv628
AS212024Marc SchmittUnclassifiedIPv4 IPv628
AS3320Deutsche Telekom AGMobileIPv426
AS6797GlobalConnect ABUnclassifiedIPv426

All 18 upstreams →

Transit

Downstream networks

inferred

Networks for which AS43623 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS200777Deutsche Welle Anstalt des Oeffentlichen RechtsUnclassifiedIPv4234
AS31518Norddeutscher Rundfunk (NDR), AdoeRUnclassifiedIPv4 IPv6153
AS21382ARD ZDF Deutschlandradio BeitragsserviceUnclassifiedIPv4116
AS35739Bayerischer RundfunkUnclassifiedIPv4 IPv6106
AS8303Westdeutscher Rundfunk KolnUnclassifiedIPv459
AS204146DeutschlandRadio KdoRUnclassifiedIPv458
AS204155DeutschlandRadio KdoRUnclassifiedIPv458
AS41969Rundfunk Berlin-Brandenburg RBBUnclassifiedIPv454

Adjacency

Adjacent networks

All 27

Every AS seen directly next to AS43623 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv6729
AS88811&1 Versatel GmbHResidentialIPv4 IPv6598
AS6939Hurricane Electric LLCTransitIPv4 IPv6400
AS200777Deutsche Welle Anstalt des Oeffentlichen RechtsUnclassifiedIPv4234
AS31518Norddeutscher Rundfunk (NDR), AdoeRUnclassifiedIPv4 IPv6153
AS3209Vodafone GmbHResidentialIPv4131
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6124
AS21382ARD ZDF Deutschlandradio BeitragsserviceUnclassifiedIPv4116
AS35739Bayerischer RundfunkUnclassifiedIPv4 IPv6106
AS8303Westdeutscher Rundfunk KolnUnclassifiedIPv459

All 27 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-18 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.17M 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.