Upstream networks
AS1221 ASN-TELSTRA Telstra Limited
Mobile APNIC
Transit
Upstream networks
Networks observed carrying traffic for AS1221: 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 |
|---|---|---|---|---|
| AS4637 | Telstra Global | Unclassified | IPv4 IPv6 | 15,833 |
| AS4608 | Asia Pacific Network Information Centre | Unclassified | IPv4 | 276 |
| AS35280 | F5 Networks SARL | Hosting | IPv4 | 276 |
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 2026-10-31 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.50M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.