Upstream networks
AS13821 ACML
Unclassified ARIN
Transit
Upstream networks
Networks observed carrying traffic for AS13821: 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 | 188 |
| AS54004 | Cablevision Lightpath LLC | Unclassified | IPv4 | 180 |
| AS174 | Cogent Communications, LLC | Transit | IPv4 | 123 |
| AS7474 | SingTel Optus Pty Ltd | Unclassified | IPv4 | 81 |
| AS9304 | HGC Global Communications Limited | Hosting | IPv4 | 76 |
| AS3356 | Level 3 Parent, LLC | Transit | IPv4 | 60 |
| AS62833 | Hudson Fiber Network, Inc | Unclassified | IPv4 | 59 |
| AS36086 | Telx | Unclassified | IPv4 | 57 |
| AS2914 | NTT America, Inc. | Transit | IPv4 | 44 |
| AS4637 | Telstra Global | Unclassified | IPv4 | 44 |
| AS4826 | Vocus Connect International Backbone | Unclassified | IPv4 | 36 |
| AS8220 | COLT Technology Services Group Limited | Hosting | IPv4 | 25 |
| AS13237 | euNetworks GmbH | Unclassified | IPv4 | 16 |
| AS15830 | Equinix (EMEA) Acquisition Enterprises B.V. | Hosting | IPv4 | 15 |
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 2026-10-18 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.17M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.