Upstream networks
AS21057 OVERON-SPAIN-AS Ciudad de la Imagen - Madrid
Unclassified RIPE
Transit
Upstream networks
Networks observed carrying traffic for AS21057: 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 | 644 |
| AS32098 | Transtelco Inc | Unclassified | IPv4 | 120 |
| AS174 | Cogent Communications, LLC | Transit | IPv4 | 97 |
| AS6762 | TELECOM ITALIA SPARKLE S.p.A. | Transit | IPv4 | 78 |
| AS7018 | AT&T Enterprises, LLC | Residential | IPv4 | 63 |
| AS19332 | COORDINADORA DE CARRIER'S, S.A. DE C.V. | Unclassified | IPv4 | 59 |
| AS3257 | GTT Communications Inc. | Transit | IPv4 | 58 |
| AS8866 | Vivacom Bulgaria EAD | Residential | IPv4 | 33 |
| AS41313 | "NOVATEL" EOOD | Unclassified | IPv4 | 28 |
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 2026-10-18 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.17M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.