Upstream networks
AS9 CMU-ROUTER
Unclassified ARIN
Transit
Upstream networks
Networks observed carrying traffic for AS9: 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 |
|---|---|---|---|---|
| AS6461 | Zayo Bandwidth | Transit | IPv4 | 315 |
| AS399855 | Keystone REN, LLC | Unclassified | IPv4 IPv6 | 98 |
| AS3356 | Level 3 Parent, LLC | Transit | IPv4 | 56 |
| AS5050 | Pittsburgh Supercomputing Center | Education | IPv4 IPv6 | 46 |
| AS2153 | CENIC | Unclassified | IPv4 | 6 |
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 2026-10-20 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.16M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.