Observed topology

AS20231 TWC-20231-NE-KS-C3 - Charter Communications Inc

Unclassified ARIN

Upstreams 2 carry this network

Downstreams 21 this network carries

Adjacent (IPv4) 23

Adjacent (IPv6) 2

Upstream graph Who carries AS20231, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS20231 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS20231: 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
AS11427	Charter Communications Inc	Residential	IPv4 IPv6	355
AS20115	Charter Communications LLC	Residential	IPv4 IPv6	137

Transit

Downstream networks

All 21

Networks for which AS20231 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS10857	JCPenney	Unclassified	IPv4	174
AS19914	AEG Kansas City Arena, LLC	Unclassified	IPv4	61
AS25714	The Kansas City Southern Railway Co.	Unclassified	IPv4	61
AS398009	Prairie Hills Wireless LLC	Unclassified	IPv4	61
AS11659	University of Kansas Medical Center	Education	IPv4	60
AS18857	USD 231 Gardner Edgerton	Unclassified	IPv4	60
AS23070	Valley County Health System	Unclassified	IPv4	60
AS46325	Stinson Morrison Hecker LLP	Unclassified	IPv4	60
AS46607	Forrest T Jones & co, Inc.	Unclassified	IPv4	60
AS393873	American Central Transport Inc.	Unclassified	IPv4	59

All 21 downstreams →

Adjacency

Adjacent networks

All 23

Every AS seen directly next to AS20231 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS20115	Charter Communications LLC	Residential	IPv4 IPv6	747
AS11427	Charter Communications Inc	Residential	IPv4 IPv6	650
AS10857	JCPenney	Unclassified	IPv4	174
AS19914	AEG Kansas City Arena, LLC	Unclassified	IPv4	61
AS25714	The Kansas City Southern Railway Co.	Unclassified	IPv4	61
AS398009	Prairie Hills Wireless LLC	Unclassified	IPv4	61
AS11659	University of Kansas Medical Center	Education	IPv4	60
AS18857	USD 231 Gardner Edgerton	Unclassified	IPv4	60
AS23070	Valley County Health System	Unclassified	IPv4	60
AS46325	Stinson Morrison Hecker LLP	Unclassified	IPv4	60

All 23 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-08 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.00M 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.