AS3209: the VODANET International IP-Backbone of Vodafone network

AS3209 is an internet Autonomous System operated by VODANET International IP-Backbone of Vodafone (Germany). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS3209?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS3209 was assigned to VODANET International IP-Backbone of Vodafone by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS3209 currently announces 173 IPv4 block(s), totaling about 12.8 million addresses (12,766,208 in all), registered in Germany. Services from VODANET International IP-Backbone of Vodafone are reached through these addresses.

What it means to see AS3209 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS3209. That means the other end sits on the VODANET International IP-Backbone of Vodafone 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.