asn.dev

Observed topology

AS15576 NTS NTS workspace AG

Unclassified RIPE

Upstreams 27 carry this network
Downstreams 34 this network carries
Adjacent (IPv4) 60
Adjacent (IPv6) 46
Upstream graph Who carries AS15576, and who carries them, drawn as a map up to the transit-free core. 6 exchanges Where AS15576 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 27

Networks observed carrying traffic for AS15576: 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
AS8220COLT Technology Services Group LimitedHostingIPv4 IPv6688
AS3356Level 3 Parent, LLCTransitIPv4 IPv6667
AS6939Hurricane Electric LLCTransitIPv4 IPv6392
AS174Cogent Communications, LLCTransitIPv4 IPv6364
AS1836green.ch AGResidentialIPv4 IPv655
AS24482SG.GSHostingIPv4 IPv653
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv653
AS3333Reseaux IP Europeens Network Coordination Centre (RIPE NCC)UnclassifiedIPv4 IPv651
AS48185team.blue NVUnclassifiedIPv4 IPv651
AS50300CustodianDC LimitedUnclassifiedIPv4 IPv651

All 27 upstreams →

Transit

Downstream networks

All 34

Networks for which AS15576 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS21232Genossenschaft GGA MaurResidentialIPv4 IPv6476
AS47617Wagner AG Informatik DienstleistungenUnclassifiedIPv4289
AS47176GAS&COM AGUnclassifiedIPv4 IPv6228
AS201134Bucher + Suter AGUnclassifiedIPv4197
AS203434Open Circle AGUnclassifiedIPv4 IPv6184
AS43800NTS workspace AGUnclassifiedIPv4174
AS25353BAR Informatik AGUnclassifiedIPv4 IPv6137
AS44879Zentrale Informatikdienste ZID Kanton Basel-LandschaftUnclassifiedIPv4117
AS39265Stadtverwaltung der Stadt BernUnclassifiedIPv4 IPv6114
AS206616wwcom AGUnclassifiedIPv4 IPv6110

All 34 downstreams →

Adjacency

Adjacent networks

All 65

Every AS seen directly next to AS15576 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS8220COLT Technology Services Group LimitedHostingIPv4 IPv62,088
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,514
AS174Cogent Communications, LLCTransitIPv4 IPv61,072
AS47176GAS&COM AGUnclassifiedIPv4 IPv6870
AS6939Hurricane Electric LLCTransitIPv4 IPv6629
AS21232Genossenschaft GGA MaurResidentialIPv4 IPv6476
AS47617Wagner AG Informatik DienstleistungenUnclassifiedIPv4289
AS198385AlpineDC SAUnclassifiedIPv4 IPv6260
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv6201
AS201134Bucher + Suter AGUnclassifiedIPv4197

All 65 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-05 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 73.57M 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.