Upstream networks
AS20203 FIRST-FINANCIAL-BANK-NA - First Financial Bank NA
Unclassified ARIN
Transit
Upstream networks
Networks observed carrying traffic for AS20203: 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 |
|---|---|---|---|---|
| AS6461 | Zayo Bandwidth | Transit | IPv4 | 42 |
| AS13807 | Great Plains Communications LLC | Residential | IPv4 | 36 |
| AS5742 | Fidium | Unclassified | IPv4 | 28 |
| AS7018 | AT&T Enterprises, LLC | Residential | IPv4 | 9 |
| AS13649 | Flexential Colorado Corp. | Hosting | IPv4 | 9 |
| AS32709 | Joink, LLC | Unclassified | IPv4 | 2 |
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 2026-11-01 10:00 UTC by route-views2,rrc00, as seen from 76 BGP vantage points across 74.48M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.