asn.dev

Observed topology

AS35661 VIRTUASYS-EU VIRTUA SYSTEMS SAS

Unclassified APNIC NSP

Upstreams 20 carry this network
Downstreams 144 this network carries
Adjacent (IPv4) 80
Adjacent (IPv6) 144
Upstream graph Who carries AS35661, and who carries them, drawn as a map up to the transit-free core. 8 exchanges Where AS35661 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 20

Networks observed carrying traffic for AS35661: 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 IPv61,040
AS6939Hurricane Electric LLCTransitIPv4 IPv6913
AS35133Eranium B.V.HostingIPv4 IPv6270
AS174Cogent Communications, LLCTransitIPv4 IPv6247
AS24482SG.GSHostingIPv4 IPv654
AS6696VERIXI SAUnclassifiedIPv434
AS30823aurologic GmbHHostingIPv430
AS50628Leonix Telecom SASUnclassifiedIPv4 IPv628
AS204092Association GRIFONUnclassifiedIPv4 IPv628
AS34927iFog GmbHHostingIPv424

All 20 upstreams →

Transit

Downstream networks

All 144

Networks for which AS35661 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS16509Amazon.com, Inc.HostingIPv61,349
AS34775LVNET LTDUnclassifiedIPv61,015
AS12322Free SASResidentialIPv6527
AS174Cogent Communications, LLCTransitIPv6471
AS61055Roshangar Rayaneh Tehran Co. Ltd.UnclassifiedIPv4 IPv6376
AS213607WORLD FIRST COMMUNICATION LTDUnclassifiedIPv4298
AS17290Austin Hadley, Sole ProprietorshipUnclassifiedIPv4 IPv6266
AS41589Lux Green Technologies SarlHostingIPv4237
AS328611Libyan Elite Company for Technical SolutionsUnclassifiedIPv4236
AS210809UniFlex Systems LimitedUnclassifiedIPv4235

All 144 downstreams →

Adjacency

Adjacent networks

All 181

Every AS seen directly next to AS35661 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv64,723
AS1299Arelion Sweden ABTransitIPv4 IPv63,595
AS205794JINZE YANGUnclassifiedIPv63,222
AS16509Amazon.com, Inc.HostingIPv61,510
AS174Cogent Communications, LLCTransitIPv4 IPv61,334
AS34775LVNET LTDUnclassifiedIPv61,015
AS35133Eranium B.V.HostingIPv4 IPv6793
AS12322Free SASResidentialIPv6528
AS61055Roshangar Rayaneh Tehran Co. Ltd.UnclassifiedIPv4 IPv6376
AS213607WORLD FIRST COMMUNICATION LTDUnclassifiedIPv4298

All 181 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-14 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.46M 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.