AS15965: the AS15965 CEGECOM S.A. network

AS15965 is an internet Autonomous System operated by AS15965 CEGECOM S.A. (Luxembourg). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS15965?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS15965 was assigned to AS15965 CEGECOM S.A. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS15965 currently announces 8 IPv4 block(s), totaling about 22 thousand addresses (22,016 in all), registered in Luxembourg. Services from AS15965 CEGECOM S.A. are reached through these addresses.

What it means to see AS15965 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS15965. That means the other end sits on the AS15965 CEGECOM S.A. network (Luxembourg). It can be legitimate — a cloud service, an ISP, a CDN — or an unexpected connection worth checking.

How to see every connection and network your devices reach

Tracing one connection's ASN at a time is tedious. Sentinela, by PC Monitor, maps the devices on your network, shows what is exposed to the internet and helps flag suspicious connections and devices — running on your Windows. Meet Sentinela.