asn.dev

Observed topology

AS20214 COMCAST-20214 - Comcast Cable Communications, LLC

Unclassified ARIN Cable/DSL/ISP

Upstreams 2 carry this network
Downstreams 23 this network carries
Adjacent (IPv4) 24
Adjacent (IPv6) 5
Upstream graph Who carries AS20214, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS20214 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS20214: 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 IPv63,979
AS3356Level 3 Parent, LLCTransitIPv495

Transit

Downstream networks

All 23

Networks for which AS20214 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS19899Miami Dade CollegeUnclassifiedIPv4244
AS63415Great Healthworks, IncUnclassifiedIPv4 IPv6208
AS36040Google LLCHostingIPv4118
AS54113Fastly, Inc.HostingIPv4 IPv692
AS17035NBCUniversalUnclassifiedIPv481
AS398044Trinity Network SolutionsResidentialIPv460
AS393843WPLG-TVUnclassifiedIPv459
AS22032Ocean Reef Club, Inc.UnclassifiedIPv455
AS16423NETTOGOUnclassifiedIPv448
AS399241Ocean BankUnclassifiedIPv447

All 23 downstreams →

Adjacency

Adjacent networks

All 25

Every AS seen directly next to AS20214 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS7922Comcast Cable Communications, LLCResidentialIPv4 IPv64,902
AS3356Level 3 Parent, LLCTransitIPv4 IPv6400
AS19899Miami Dade CollegeUnclassifiedIPv4244
AS63415Great Healthworks, IncUnclassifiedIPv4 IPv6208
AS36040Google LLCHostingIPv4118
AS54113Fastly, Inc.HostingIPv4 IPv692
AS17035NBCUniversalUnclassifiedIPv481
AS398044Trinity Network SolutionsResidentialIPv460
AS393843WPLG-TVUnclassifiedIPv459
AS22032Ocean Reef Club, Inc.UnclassifiedIPv455

All 25 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.