asn.dev

Observed topology

AS31230 Slovak University of Technology in Bratislava

Unclassified RIPE

Upstreams 0 carry this network
Downstreams 29 this network carries
Adjacent (IPv4) 32
Adjacent (IPv6) 20
Upstream graph Who carries AS31230, and who carries them, drawn as a map up to the transit-free core. 1 exchange Where AS31230 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS31230: 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.

No upstream observed. Typical for a tier-1 network that buys transit from nobody.

Transit

Downstream networks

All 29

Networks for which AS31230 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS51013WebSupport s.r.o.HostingIPv4 IPv629
AS48326DataNetworks s.r.o.ResidentialIPv4 IPv618
AS31117ENERGOTEL a.s.UnclassifiedIPv417
AS15935ha-vel internet s.r.o.UnclassifiedIPv4 IPv616
AS57760Kinet s.r.o.ResidentialIPv416
AS28952O2 Business Services, a.sUnclassifiedIPv4 IPv615
AS42005LightStorm Services s.r.o.HostingIPv415
AS209531OSTV s.r.o.ResidentialIPv4 IPv614
AS56349IP-Net s.r.o.ResidentialIPv4 IPv613
AS201603AIRNET s.r.o.UnclassifiedIPv4 IPv612

All 29 downstreams →

Adjacency

Adjacent networks

All 34

Every AS seen directly next to AS31230 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS48362Stadtwerke FeldkirchResidentialIPv4 IPv6529
AS31117ENERGOTEL a.s.UnclassifiedIPv4137
AS15935ha-vel internet s.r.o.UnclassifiedIPv4 IPv699
AS9002RETN LimitedUnclassifiedIPv677
AS8778Slovanet a.s.ResidentialIPv456
AS25248RADIOKOMUNIKACE a.s.UnclassifiedIPv4 IPv649
AS48326DataNetworks s.r.o.ResidentialIPv4 IPv639
AS51013WebSupport s.r.o.HostingIPv4 IPv629
AS28952O2 Business Services, a.sUnclassifiedIPv4 IPv623
AS42005LightStorm Services s.r.o.HostingIPv421

All 34 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-26 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M 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.