Upstream networks
AS40021 CONTABO-40021 - Contabo Inc.
Hosting ARIN Content
Transit
Upstream networks
Networks observed carrying traffic for AS40021: 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 |
|---|---|---|---|---|
| AS174 | Cogent Communications, LLC | Transit | IPv4 IPv6 | 2,874 |
| AS3356 | Level 3 Parent, LLC | Transit | IPv4 IPv6 | 2,107 |
| AS46887 | Crown Castle Fiber LLC | Unclassified | IPv4 IPv6 | 674 |
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 2026-11-09 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.03M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.