asn.dev

Observed topology

AS21283 A1SI-AS A1 Slovenija

Residential RIPE Cable/DSL/ISP

Upstreams 3 carry this network
Downstreams 33 this network carries
Adjacent (IPv4) 38
Adjacent (IPv6) 14
Upstream graph Who carries AS21283, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS21283 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS21283: 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
AS8447A1 Telekom Austria AGResidentialIPv4 IPv61,014
AS6939Hurricane Electric LLCTransitIPv4 IPv6145
AS3303Swisscom (Schweiz) AGResidentialIPv4 IPv633

Transit

Downstream networks

All 33

Networks for which AS21283 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS48894Optimus IT d.o.o.UnclassifiedIPv4 IPv6609
AS42473Anexia Cloud Solutions GmbHHostingIPv4 IPv6147
AS196846A1 Slovenija telekomunikacijske storitve,d.d.UnclassifiedIPv4122
AS210197ROK TAJZELUnclassifiedIPv4 IPv6104
AS44968IPROM d.o.oUnclassifiedIPv4 IPv699
AS199612Dun & Bradstreet d.o.o.UnclassifiedIPv4 IPv689
AS25467Akton d.o.o.UnclassifiedIPv476
AS34367Banka SlovenijeUnclassifiedIPv463
AS25059Nova Ljubljanska Banka d.d.UnclassifiedIPv461
AS196895Uprava Republike Slovenije za javna placilaUnclassifiedIPv461

All 33 downstreams →

Adjacency

Adjacent networks

All 38

Every AS seen directly next to AS21283 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS8447A1 Telekom Austria AGResidentialIPv4 IPv62,801
AS48894Optimus IT d.o.o.UnclassifiedIPv4 IPv6609
AS6939Hurricane Electric LLCTransitIPv4 IPv6208
AS42473Anexia Cloud Solutions GmbHHostingIPv4 IPv6147
AS196846A1 Slovenija telekomunikacijske storitve,d.d.UnclassifiedIPv4122
AS210197ROK TAJZELUnclassifiedIPv4 IPv6104
AS25467Akton d.o.o.UnclassifiedIPv4100
AS44968IPROM d.o.oUnclassifiedIPv4 IPv699
AS199612Dun & Bradstreet d.o.o.UnclassifiedIPv4 IPv689
AS34367Banka SlovenijeUnclassifiedIPv463

All 38 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-29 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.36M 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.