AS5578: the AS-BENESTRA Bratislava, Slovak Republic network

AS5578 is an internet Autonomous System operated by AS-BENESTRA Bratislava, Slovak Republic (Slovakia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS5578?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS5578 was assigned to AS-BENESTRA Bratislava, Slovak Republic by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS5578 currently announces 64 IPv4 block(s), totaling about 314.1 thousand addresses (314,112 in all), registered in Slovakia. Services from AS-BENESTRA Bratislava, Slovak Republic are reached through these addresses.

What it means to see AS5578 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS5578. That means the other end sits on the AS-BENESTRA Bratislava, Slovak Republic network (Slovakia). 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.