AS201917: the VF-GROUP-DC1 network

AS201917 is an internet Autonomous System operated by VF-GROUP-DC1 (Germany). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS201917?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS201917 was assigned to VF-GROUP-DC1 by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS201917 currently announces 26 IPv4 block(s), totaling about 13.6 thousand addresses (13,568 in all), registered in Germany. Services from VF-GROUP-DC1 are reached through these addresses.

What it means to see AS201917 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS201917. That means the other end sits on the VF-GROUP-DC1 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.