Observed topology

AS22909 COMCAST-22909

Unclassified ARIN Cable/DSL/ISP

Upstreams 1 carry this network

Downstreams 42 this network carries

Adjacent (IPv4) 41

Adjacent (IPv6) 8

Upstream graph Who carries AS22909, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS22909 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS22909: 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.

AS	Network	Type	Families	Paths seen
AS7922	Comcast Cable Communications, LLC	Residential	IPv4 IPv6	1,876

Transit

Downstream networks

All 42

Networks for which AS22909 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS19685	CSI Telecom Group, Inc	Unclassified	IPv4	1,380
AS17123	Team Health, Inc.	Unclassified	IPv4	240
AS11086	Pitney Bowes Incorporated	Unclassified	IPv4	179
AS4374	CKE Restaurants Holdings, Inc.	Unclassified	IPv4	175
AS62958	ADT LLC	Unclassified	IPv4	101
AS54113	Fastly, Inc.	Hosting	IPv4 IPv6	92
AS25712	Computer Services Inc	Unclassified	IPv4	90
AS11297	Lipscomb University	Education	IPv4 IPv6	80
AS27016	United States Nuclear Regulatory Commission	Unclassified	IPv4 IPv6	74
AS26335	Middle Tennessee State University	Unclassified	IPv4	69

All 42 downstreams →

Adjacency

Adjacent networks

All 44

Every AS seen directly next to AS22909 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS7922	Comcast Cable Communications, LLC	Residential	IPv4 IPv6	4,278
AS19685	CSI Telecom Group, Inc	Unclassified	IPv4	1,380
AS3356	Level 3 Parent, LLC	Transit	IPv4	1,030
AS17123	Team Health, Inc.	Unclassified	IPv4	240
AS11086	Pitney Bowes Incorporated	Unclassified	IPv4	179
AS4374	CKE Restaurants Holdings, Inc.	Unclassified	IPv4	175
AS62958	ADT LLC	Unclassified	IPv4	101
AS54113	Fastly, Inc.	Hosting	IPv4 IPv6	92
AS25712	Computer Services Inc	Unclassified	IPv4	90
AS11297	Lipscomb University	Education	IPv4 IPv6	80

All 44 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-21 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.