asn.dev

Observed topology

AS5578 AS-BENESTRA SWAN, a.s.

Unclassified ARIN NSP

Upstreams 25 carry this network
Downstreams 54 this network carries
Adjacent (IPv4) 75
Adjacent (IPv6) 33
Upstream graph Who carries AS5578, and who carries them, drawn as a map up to the transit-free core. 5 exchanges Where AS5578 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 25

Networks observed carrying traffic for AS5578: 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
AS1299Arelion Sweden ABTransitIPv4 IPv61,158
AS174Cogent Communications, LLCTransitIPv4 IPv6591
AS6939Hurricane Electric LLCTransitIPv4 IPv6509
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv6169
AS1836green.ch AGResidentialIPv4 IPv658
AS12859BIT BVHostingIPv4 IPv658
AS24482SG.GSHostingIPv4 IPv658
AS29504Freenet Liberec, z.s.UnclassifiedIPv4 IPv658
AS34019Hivane AssociationUnclassifiedIPv4 IPv658
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv658

All 25 upstreams →

Transit

Downstream networks

All 54

Networks for which AS5578 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS12837"1 CLOUD LAB" LLCUnclassifiedIPv4590
AS6862GraTex International a.s.UnclassifiedIPv4464
AS25373National Agency for Network and Electronic ServicesUnclassifiedIPv4 IPv6383
AS48473Towercom a.s.UnclassifiedIPv4 IPv6366
AS58328IMAFEX, s.r.o.UnclassifiedIPv4351
AS15962Orange Slovensko a.s.UnclassifiedIPv4 IPv6245
AS2607Zdruzenie pouzivatelov Slovenskej akademickej datovej siete SANETEducationIPv4204
AS64488IOPS, s.r.o.UnclassifiedIPv4 IPv6174
AS203933DataCentrumUnclassifiedIPv4174
AS56800LAST MILE spol. s r.o.UnclassifiedIPv4 IPv6166

All 54 downstreams →

Adjacency

Adjacent networks

All 80

Every AS seen directly next to AS5578 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv63,584
AS174Cogent Communications, LLCTransitIPv4 IPv61,873
AS34549meerfarbig GmbH & Co. KGHostingIPv4 IPv61,322
AS6939Hurricane Electric LLCTransitIPv4 IPv61,165
AS12837"1 CLOUD LAB" LLCUnclassifiedIPv4880
AS31117ENERGOTEL a.s.UnclassifiedIPv4 IPv6776
AS6862GraTex International a.s.UnclassifiedIPv4464
AS15962Orange Slovensko a.s.UnclassifiedIPv4 IPv6408
AS25373National Agency for Network and Electronic ServicesUnclassifiedIPv4 IPv6383
AS48473Towercom a.s.UnclassifiedIPv4 IPv6366

All 80 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-09 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.03M 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.