Upstream networks
AS21320 GEANT_IAS_VRF GEANT Vereniging
Unclassified RIPE Educational/Research
Transit
Upstream networks
Networks observed carrying traffic for AS21320: 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 |
|---|---|---|---|---|
| AS3356 | Level 3 Parent, LLC | Transit | IPv4 | 21 |
| AS2603 | NORDUnet | Education | IPv4 | 14 |
| AS174 | Cogent Communications, LLC | Transit | IPv4 | 9 |
| AS6939 | Hurricane Electric LLC | Transit | IPv4 | 7 |
| AS9002 | RETN Limited | Unclassified | IPv4 | 5 |
| AS3216 | PJSC "Vimpelcom" | Mobile | IPv4 | 1 |
| AS3303 | Swisscom (Schweiz) AG | Residential | IPv4 | 1 |
| AS8551 | Bezeq International Ltd. | Unclassified | IPv4 | 1 |
| AS48185 | team.blue NV | Unclassified | IPv4 | 1 |
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 2026-11-05 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 73.57M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.