asn.dev

Observed topology

AS33490 COMCAST-33490 - Comcast Cable Communications, LLC

Unclassified ARIN

Upstreams 2 carry this network
Downstreams 64 this network carries
Adjacent (IPv4) 65
Adjacent (IPv6) 12
Upstream graph Who carries AS33490, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS33490 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS33490: 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
AS7922Comcast Cable Communications, LLCResidentialIPv4 IPv62,985
AS3356Level 3 Parent, LLCTransitIPv4190

Transit

Downstream networks

All 64

Networks for which AS33490 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS393408University of PortlandUnclassifiedIPv4486
AS13541Siemens Industry Software Inc.UnclassifiedIPv4252
AS31128Apple Distribution International Ltd.UnclassifiedIPv4 IPv6177
AS15045KITTELSON AND ASSOCIATES, INC.UnclassifiedIPv4165
AS21718Northwest Natural GasUnclassifiedIPv4141
AS40298General Pacific, Inc.UnclassifiedIPv4 IPv6140
AS1823Hannah Motor CompanyUnclassifiedIPv4120
AS11396Williams Information Technology LLCUnclassifiedIPv4120
AS13888Bear Creek Operations IncUnclassifiedIPv4120
AS53752US DigitalUnclassifiedIPv4117

All 64 downstreams →

Adjacency

Adjacent networks

All 66

Every AS seen directly next to AS33490 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS7922Comcast Cable Communications, LLCResidentialIPv4 IPv65,823
AS3356Level 3 Parent, LLCTransitIPv4 IPv6952
AS393408University of PortlandUnclassifiedIPv4486
AS13541Siemens Industry Software Inc.UnclassifiedIPv4252
AS31128Apple Distribution International Ltd.UnclassifiedIPv4 IPv6177
AS15045KITTELSON AND ASSOCIATES, INC.UnclassifiedIPv4165
AS21718Northwest Natural GasUnclassifiedIPv4141
AS40298General Pacific, Inc.UnclassifiedIPv4 IPv6140
AS1823Hannah Motor CompanyUnclassifiedIPv4120
AS11396Williams Information Technology LLCUnclassifiedIPv4120

All 66 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M 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.