Upstream networks
AS19855 MASERGY
Unclassified ARIN
Transit
Upstream networks
Networks observed carrying traffic for AS19855: 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 |
|---|---|---|---|---|
| AS3356 | Level 3 Parent, LLC | Transit | IPv4 IPv6 | 3,609 |
| AS7922 | Comcast Cable Communications, LLC | Residential | IPv4 IPv6 | 853 |
| AS3491 | PCCW Global (HK) Ltd. | Transit | IPv4 IPv6 | 588 |
| AS7473 | Singapore Telecommunications Ltd | Unclassified | IPv4 IPv6 | 331 |
| AS12956 | TELEFONICA GLOBAL SOLUTIONS SL | Transit | IPv4 IPv6 | 231 |
| AS7474 | SingTel Optus Pty Ltd | Unclassified | IPv4 IPv6 | 185 |
| AS33491 | Comcast Cable Communications, LLC | Unclassified | IPv4 | 180 |
| AS174 | Cogent Communications, LLC | Transit | IPv4 IPv6 | 55 |
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.