Upstream networks
AS17621 CNCGROUP-SH China Unicom Shanghai network
Unclassified APNIC
Transit
Upstream networks
Networks observed carrying traffic for AS17621: 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 |
|---|---|---|---|---|
| AS4837 | CHINA UNICOM China169 Backbone | Mobile | IPv4 IPv6 | 29,839 |
| AS9929 | CHINA UNICOM Industrial Internet Backbone | Unclassified | IPv4 IPv6 | 275 |
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 2026-10-15 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.09M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.