Observed topology

AS33287 COMCAST-33287

Unclassified ARIN Cable/DSL/ISP

Upstreams 2 carry this network

Downstreams 133 this network carries

Adjacent (IPv4) 136

Adjacent (IPv6) 9

Upstream graph Who carries AS33287, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS33287 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS33287: 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	11,538
AS3356	Level 3 Parent, LLC	Transit	IPv4	159

Transit

Downstream networks

All 133

Networks for which AS33287 was observed as the last hop before the origin, meaning it appears to provide them transit.

AS	Network	Type	Families	Paths seen
AS397380	Temple University Health System, Inc.	Unclassified	IPv4	626
AS16958	Bucks County Intermediate Unit #22	Unclassified	IPv4	358
AS14539	Vantage Labs LLC	Unclassified	IPv4	204
AS46807	GLOUC-NJ	Unclassified	IPv4	174
AS15243	Widener University	Unclassified	IPv4	168
AS19576	Eastern University	Unclassified	IPv4	156
AS26881	IPR International, LLC.	Unclassified	IPv4	136
AS395503	ComTec Cloud	Unclassified	IPv4	131
AS33261	Power Home Remodeling LLC	Unclassified	IPv4	109
AS19826	UNIVERSAL HEALTH SERVICES	Unclassified	IPv4	104

All 133 downstreams →

Adjacency

Adjacent networks

All 137

Every AS seen directly next to AS33287 in a routing path, in either direction.

AS	Network	Type	Families	Paths seen
AS7922	Comcast Cable Communications, LLC	Residential	IPv4 IPv6	16,562
AS3356	Level 3 Parent, LLC	Transit	IPv4 IPv6	1,398
AS397380	Temple University Health System, Inc.	Unclassified	IPv4	626
AS16958	Bucks County Intermediate Unit #22	Unclassified	IPv4	358
AS14539	Vantage Labs LLC	Unclassified	IPv4	204
AS46807	GLOUC-NJ	Unclassified	IPv4	174
AS15243	Widener University	Unclassified	IPv4	168
AS36253	Delaware County Intermediate Unit	Unclassified	IPv4	166
AS19576	Eastern University	Unclassified	IPv4	156
AS26881	IPR International, LLC.	Unclassified	IPv4	136

All 137 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-01 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.48M 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.