Upstream networks
AS13977 CTELCO - Fidium
Residential ARIN Cable/DSL/ISP
Transit
Upstream networks
Networks observed carrying traffic for AS13977: 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 IPv6 | 26,168 |
| AS174 | Cogent Communications, LLC | Transit | IPv4 IPv6 | 19,226 |
| AS33422 | New England Telehealth Consortium | Unclassified | IPv4 | 31 |
| AS63243 | Synergent | Unclassified | IPv4 | 31 |
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 2026-11-11 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 73.24M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.