Upstream networks
AS21660 BAXALTA
Unclassified ARIN
Transit
Upstream networks
Networks observed carrying traffic for AS21660: 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 |
|---|---|---|---|---|
| AS209 | CenturyLink Communications, LLC | Residential | IPv4 | 240 |
| AS8220 | COLT Technology Services Group Limited | Hosting | IPv4 | 231 |
| AS139883 | SPTEL PTE. LTD. | Unclassified | IPv4 | 84 |
| AS3356 | Level 3 Parent, LLC | Transit | IPv4 | 43 |
| AS8437 | Hutchison Drei Austria GmbH | Unclassified | IPv4 | 42 |
| AS15830 | Equinix (EMEA) Acquisition Enterprises B.V. | Hosting | IPv4 | 16 |
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 2026-10-24 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 72.94M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.