Observed topology

AS33661 CMCS

Unclassified ARIN

Upstreams 1 carry this network

Downstreams 21 this network carries

Adjacent (IPv4) 22

Adjacent (IPv6) 3

Upstream graph Who carries AS33661, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS33661 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS33661: 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	899

Transit

Downstream networks

All 21

Networks for which AS33661 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS46576	Loews Hotels at Universal Orlando	Unclassified	IPv4	540
AS63402	Universal Orlando	Unclassified	IPv4	280
AS26876	chico's fas inc	Unclassified	IPv4	173
AS6931	Ringling College of Art and Design	Education	IPv4	120
AS46999	Crews Banking Corporation	Unclassified	IPv4	120
AS63264	Alternative Choice Wireless, LLC	Unclassified	IPv4	120
AS54113	Fastly, Inc.	Hosting	IPv4 IPv6	92
AS53937	Sarasota Memorial Hospital	Unclassified	IPv4	90
AS36040	Google LLC	Hosting	IPv4	60
AS36763	Hearst-Argyle Television, Inc.	Unclassified	IPv4	60

All 21 downstreams →

Adjacency

Adjacent networks

All 23

Every AS seen directly next to AS33661 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS7922	Comcast Cable Communications, LLC	Residential	IPv4 IPv6	2,917
AS46576	Loews Hotels at Universal Orlando	Unclassified	IPv4	540
AS63402	Universal Orlando	Unclassified	IPv4	280
AS26876	chico's fas inc	Unclassified	IPv4	173
AS17035	NBCUniversal	Unclassified	IPv4	124
AS6931	Ringling College of Art and Design	Education	IPv4	120
AS46999	Crews Banking Corporation	Unclassified	IPv4	120
AS63264	Alternative Choice Wireless, LLC	Unclassified	IPv4	120
AS54113	Fastly, Inc.	Hosting	IPv4 IPv6	92
AS53937	Sarasota Memorial Hospital	Unclassified	IPv4	90

All 23 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-29 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.36M 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.