AS12316: the FITSNET FITS Internet Backbone network

AS12316 is an internet Autonomous System operated by FITSNET FITS Internet Backbone (Germany). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS12316?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS12316 was assigned to FITSNET FITS Internet Backbone by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS12316 currently announces 8 IPv4 block(s), totaling about 13.8 thousand addresses (13,824 in all), registered in Germany. Services from FITSNET FITS Internet Backbone are reached through these addresses.

What it means to see AS12316 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS12316. That means the other end sits on the FITSNET FITS Internet Backbone network (Germany). 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.