asn.dev

Observed topology

AS33287 COMCAST-33287 - Comcast Cable Communications, LLC

Unclassified ARIN

Upstreams 2 carry this network
Downstreams 131 this network carries
Adjacent (IPv4) 134
Adjacent (IPv6) 10
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.

ASNetworkTypeFamiliesPaths seen
AS7922Comcast Cable Communications, LLCResidentialIPv4 IPv611,218
AS3356Level 3 Parent, LLCTransitIPv4159

Transit

Downstream networks

All 131

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

ASNetworkTypeFamiliesPaths seen
AS397380Temple University Health System, Inc.UnclassifiedIPv4626
AS16958Bucks County Intermediate Unit #22UnclassifiedIPv4 IPv6387
AS14539Vantage Labs LLCUnclassifiedIPv4204
AS46807GLOUC-NJUnclassifiedIPv4174
AS15243Widener UniversityUnclassifiedIPv4167
AS19576Eastern UniversityUnclassifiedIPv4154
AS26881IPR International, LLC.UnclassifiedIPv4135
AS395503ComTec CloudUnclassifiedIPv4129
AS19826UNIVERSAL HEALTH SERVICESUnclassifiedIPv4112
AS33261Power Home Remodeling LLCUnclassifiedIPv4108

All 131 downstreams →

Adjacency

Adjacent networks

All 135

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

ASNetworkTypeFamiliesPaths seen
AS7922Comcast Cable Communications, LLCResidentialIPv4 IPv616,333
AS3356Level 3 Parent, LLCTransitIPv4 IPv61,442
AS397380Temple University Health System, Inc.UnclassifiedIPv4626
AS16958Bucks County Intermediate Unit #22UnclassifiedIPv4 IPv6387
AS14539Vantage Labs LLCUnclassifiedIPv4204
AS46807GLOUC-NJUnclassifiedIPv4174
AS15243Widener UniversityUnclassifiedIPv4167
AS36253Delaware County Intermediate UnitUnclassifiedIPv4166
AS19576Eastern UniversityUnclassifiedIPv4154
AS26881IPR International, LLC.UnclassifiedIPv4135

All 135 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-13 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.40M 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.