Adjacent networks
AS3999 PENN-STATE
Education ARIN
Adjacency
Adjacent networks
Every AS seen directly next to AS3999 in a routing path, in either direction.
| AS | Network | Type | Families | Paths seen |
|---|---|---|---|---|
| AS6461 | Zayo Bandwidth | Transit | IPv4 | 508 |
| AS6939 | Hurricane Electric LLC | Transit | IPv4 IPv6 | 146 |
| AS399855 | Keystone REN, LLC | Unclassified | IPv4 IPv6 | 119 |
| AS7016 | Comcast Cable Communications, LLC | Unclassified | IPv4 IPv6 | 27 |
| AS24482 | SG.GS | Hosting | IPv4 IPv6 | 14 |
| AS37721 | Virtual Technologies & Solutions | Residential | IPv4 IPv6 | 14 |
| AS10886 | University of Maryland | Education | IPv4 | 13 |
Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.
Derived from routing tables collected at 2026-10-19 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.