asn.dev

Observed topology

AS49870 AS49870-BV Alsycon B.V.

Hosting DROP-listed space RIPE Cable/DSL/ISP

Upstreams 13 carry this network
Downstreams 8 this network carries
Adjacent (IPv4) 23
Adjacent (IPv6) 12
Upstream graph Who carries AS49870, and who carries them, drawn as a map up to the transit-free core. 3 exchanges Where AS49870 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 13

Networks observed carrying traffic for AS49870: 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
AS57717FiberXpress BVUnclassifiedIPv4572
AS1299Arelion Sweden ABTransitIPv4 IPv6364
AS174Cogent Communications, LLCTransitIPv4 IPv6190
AS3257GTT Communications Inc.TransitIPv4 IPv6121
AS13194UAB "Bite Lietuva"UnclassifiedIPv452
AS6939Hurricane Electric LLCTransitIPv4 IPv646
AS202365Omer GOLGELIUnclassifiedIPv420
AS1257Tele2 Sverige ABMobileIPv42
AS1103SURF B.V.UnclassifiedIPv61
AS9002RETN LimitedUnclassifiedIPv41

All 13 upstreams →

Transit

Downstream networks

inferred

Networks for which AS49870 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS209101IP Vendetta Inc.HostingIPv4353
AS49305Alsycon B.V.UnclassifiedIPv4 IPv6276
AS7489HostUSHostingIPv4 IPv6152
AS51942EK-Media B.V.HostingIPv4127
AS218859IT HELP LCCUnclassifiedIPv460
AS401146TURNELUnclassifiedIPv458
AS208911Alsycon B.V.HostingIPv636
AS209425KOI CLOUD SERVICES (Pty) LtdUnclassifiedIPv41

Adjacency

Adjacent networks

All 27

Every AS seen directly next to AS49870 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS57717FiberXpress BVUnclassifiedIPv4713
AS1299Arelion Sweden ABTransitIPv4 IPv6696
AS174Cogent Communications, LLCTransitIPv4 IPv6368
AS209101IP Vendetta Inc.HostingIPv4353
AS49305Alsycon B.V.UnclassifiedIPv4 IPv6276
AS6939Hurricane Electric LLCTransitIPv4 IPv6240
AS3257GTT Communications Inc.TransitIPv4 IPv6233
AS51942EK-Media B.V.HostingIPv4180
AS7489HostUSHostingIPv4 IPv6152
AS13194UAB "Bite Lietuva"UnclassifiedIPv4112

All 27 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.