Upstream networks
AS27370 CITYOFBOSTON
Unclassified ARIN
Transit
Upstream networks
Networks observed carrying traffic for AS27370: 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 |
|---|---|---|---|---|
| AS54004 | Cablevision Lightpath LLC | Unclassified | IPv4 | 680 |
| AS27552 | TowardEX Technologies International, Inc. | Unclassified | IPv4 | 162 |
| AS46887 | Crown Castle Fiber LLC | Unclassified | IPv4 | 48 |
| AS6939 | Hurricane Electric LLC | Transit | IPv4 | 10 |
| AS293 | ESnet | Unclassified | IPv4 | 1 |
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 2026-10-22 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.12M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.