asn.dev

Observed topology

AS8001 COLOGIX - Cologix, Inc

Hosting ARIN

Upstreams 16 carry this network
Downstreams 23 this network carries
Adjacent (IPv4) 35
Adjacent (IPv6) 15
Upstream graph Who carries AS8001, and who carries them, drawn as a map up to the transit-free core. 8 exchanges Where AS8001 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 16

Networks observed carrying traffic for AS8001: 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
AS6461Zayo BandwidthTransitIPv4 IPv61,178
AS3356Level 3 Parent, LLCTransitIPv4 IPv6841
AS174Cogent Communications, LLCTransitIPv4 IPv6489
AS1299Arelion Sweden ABTransitIPv4431
AS9002RETN LimitedUnclassifiedIPv4 IPv6147
AS6939Hurricane Electric LLCTransitIPv4 IPv640
AS24482SG.GSHostingIPv4 IPv636
AS2497Internet Initiative Japan Inc.UnclassifiedIPv434
AS20205Amplex Electric, Inc.ResidentialIPv415
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv63

All 16 upstreams →

Transit

Downstream networks

All 23

Networks for which AS8001 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS40715Cologix, IncHostingIPv4 IPv6623
AS396924Skylands NetworksUnclassifiedIPv4 IPv6328
AS30418SumTotal Systems, Inc.UnclassifiedIPv4232
AS30202Level IVUnclassifiedIPv4231
AS4883-Reserved AS-UnclassifiedIPv4114
AS26164SWKUnclassifiedIPv459
AS994Viirtue LLCUnclassifiedIPv458
AS3599CDW Technologies LLCHostingIPv458
AS32746Computer Design & Integration LLCUnclassifiedIPv458
AS46472-Reserved AS-UnclassifiedIPv458

All 23 downstreams →

Adjacency

Adjacent networks

All 39

Every AS seen directly next to AS8001 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6461Zayo BandwidthTransitIPv4 IPv61,972
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,457
AS174Cogent Communications, LLCTransitIPv4 IPv6816
AS1299Arelion Sweden ABTransitIPv4639
AS40715Cologix, IncHostingIPv4 IPv6623
AS396924Skylands NetworksUnclassifiedIPv4 IPv6328
AS30418SumTotal Systems, Inc.UnclassifiedIPv4232
AS30202Level IVUnclassifiedIPv4231
AS9002RETN LimitedUnclassifiedIPv4 IPv6219
AS4883-Reserved AS-UnclassifiedIPv4114

All 39 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M 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.