asn.dev

Observed topology

AS20115 CHARTER-20115 - Charter Communications LLC

Residential ARIN Cable/DSL/ISP

Upstreams 17 carry this network
Downstreams 135 this network carries
Adjacent (IPv4) 156
Adjacent (IPv6) 29
Upstream graph Who carries AS20115, and who carries them, drawn as a map up to the transit-free core. 15 exchanges Where AS20115 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

All 17

Networks observed carrying traffic for AS20115: 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
AS6939Hurricane Electric LLCTransitIPv4 IPv668,339
AS7843Charter Communications IncResidentialIPv4 IPv634,543
AS1299Arelion Sweden ABTransitIPv4 IPv613,847
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv69,495
AS6461Zayo BandwidthTransitIPv4 IPv69,223
AS3257GTT Communications Inc.TransitIPv4 IPv65,910
AS3356Level 3 Parent, LLCTransitIPv4 IPv65,006
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv64,788
AS3491PCCW Global (HK) Ltd.TransitIPv4 IPv63,215
AS14907Wikimedia Foundation Inc.HostingIPv4 IPv62,503

All 17 upstreams →

Transit

Downstream networks

All 135

Networks for which AS20115 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS27338GoNetSpeedUnclassifiedIPv43,061
AS33588Charter Communications LLCUnclassifiedIPv4 IPv62,743
AS20001Charter Communications IncResidentialIPv4 IPv61,355
AS19115Charter Communications LLCUnclassifiedIPv4 IPv6764
AS11427Charter Communications IncResidentialIPv4 IPv6741
AS54816Spring City Cable TV, IncUnclassifiedIPv4732
AS40264Charter Communications LLCUnclassifiedIPv4 IPv6625
AS22974Charter Communications LLCUnclassifiedIPv4 IPv6449
AS27631PANGAEAUnclassifiedIPv4431
AS32104Wellmont Health SystemUnclassifiedIPv4405

All 135 downstreams →

Adjacency

Adjacent networks

All 156

Every AS seen directly next to AS20115 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS6939Hurricane Electric LLCTransitIPv4 IPv687,216
AS7843Charter Communications IncResidentialIPv4 IPv634,576
AS1299Arelion Sweden ABTransitIPv4 IPv621,375
AS3257GTT Communications Inc.TransitIPv4 IPv613,071
AS6830Liberty Global Europe Holding B.V.ResidentialIPv4 IPv610,074
AS6461Zayo BandwidthTransitIPv4 IPv69,286
AS40264Charter Communications LLCUnclassifiedIPv4 IPv67,404
AS3356Level 3 Parent, LLCTransitIPv4 IPv66,520
AS7018AT&T Enterprises, LLCResidentialIPv4 IPv65,600
AS33588Charter Communications LLCUnclassifiedIPv4 IPv63,905

All 156 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-05 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 73.57M 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.