asn.dev

Observed topology

AS4181 TDS-AS

Residential RIPE Cable/DSL/ISP

Upstreams 17 carry this network
Downstreams 42 this network carries
Adjacent (IPv4) 59
Adjacent (IPv6) 13
Upstream graph Who carries AS4181, and who carries them, drawn as a map up to the transit-free core. 10 exchanges Where AS4181 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 17

Networks observed carrying traffic for AS4181: 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 IPv62,662
AS6939Hurricane Electric LLCTransitIPv4 IPv6595
AS3257GTT Communications Inc.TransitIPv4 IPv6574
AS64289Macarne.comUnclassifiedIPv4453
AS9002RETN LimitedUnclassifiedIPv4 IPv6165
AS852TELUS Communications Inc.ResidentialIPv4 IPv686
AS24482SG.GSHostingIPv4 IPv686
AS394256Tech Futures Interactive Inc.UnclassifiedIPv4 IPv686
AS37721Virtual Technologies & SolutionsResidentialIPv4 IPv683
AS293ESnetUnclassifiedIPv482

All 17 upstreams →

Transit

Downstream networks

All 42

Networks for which AS4181 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS54519US Signal Company, L.L.C.UnclassifiedIPv4 IPv6554
AS395535Weiss InternetUnclassifiedIPv4407
AS396843Dean Health Plan, Inc.UnclassifiedIPv4277
AS396965Wildcard Corp.UnclassifiedIPv4 IPv6194
AS10747Epic Hosting, LLCHostingIPv4165
AS21896Alliant EnergyUnclassifiedIPv4132
AS23083Ironcore, Inc.UnclassifiedIPv4104
AS395086SC Data Center, Inc.UnclassifiedIPv499
AS14847Peck Servers, LLCHostingIPv4 IPv692
AS396145Exact Sciences CorporationUnclassifiedIPv478

All 42 downstreams →

Adjacency

Adjacent networks

All 59

Every AS seen directly next to AS4181 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1299Arelion Sweden ABTransitIPv4 IPv64,520
AS3257GTT Communications Inc.TransitIPv4 IPv6998
AS6939Hurricane Electric LLCTransitIPv4 IPv6962
AS54519US Signal Company, L.L.C.UnclassifiedIPv4 IPv6814
AS64289Macarne.comUnclassifiedIPv4454
AS395535Weiss InternetUnclassifiedIPv4407
AS396843Dean Health Plan, Inc.UnclassifiedIPv4277
AS9002RETN LimitedUnclassifiedIPv4 IPv6268
AS396965Wildcard Corp.UnclassifiedIPv4 IPv6194
AS394256Tech Futures Interactive Inc.UnclassifiedIPv4 IPv6170

All 59 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.