AS3330: the PROFINET-AT Vienna, Austria network

AS3330 is an internet Autonomous System operated by PROFINET-AT Vienna, Austria (Austria). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS3330?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS3330 was assigned to PROFINET-AT Vienna, Austria by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS3330 currently announces 11 IPv4 block(s), totaling about 49.7 thousand addresses (49,664 in all), registered in Austria. Services from PROFINET-AT Vienna, Austria are reached through these addresses.

What it means to see AS3330 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS3330. That means the other end sits on the PROFINET-AT Vienna, Austria network (Austria). 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.