Upstream networks
AS21504 BESSEMER-GROUP-INCORPORATED
Unclassified ARIN
Transit
Upstream networks
Networks observed carrying traffic for AS21504: 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 |
|---|---|---|---|---|
| AS55002 | F5, Inc. | Unclassified | IPv4 | 406 |
| AS46887 | Crown Castle Fiber LLC | Unclassified | IPv4 | 176 |
| AS174 | Cogent Communications, LLC | Transit | IPv4 | 143 |
| AS54004 | Cablevision Lightpath LLC | Unclassified | IPv4 | 118 |
| AS6461 | Zayo Bandwidth | Transit | IPv4 | 117 |
| AS46450 | Pilot Fiber, Inc. | Residential | IPv4 | 72 |
| AS3356 | Level 3 Parent, LLC | Transit | IPv4 | 50 |
| AS701 | Verizon Business | Residential | IPv4 | 43 |
| AS33287 | Comcast Cable Communications, LLC | Unclassified | IPv4 | 3 |
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.
Derived from routing tables collected at 2026-10-21 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.14M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.