AS204860: the NETX NetX Networks a.s. network

AS204860 is an internet Autonomous System operated by NETX NetX Networks a.s. (Czechia). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS204860?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS204860 was assigned to NETX NetX Networks a.s. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS204860 currently announces 7 IPv4 block(s), totaling about 4.1 thousand addresses (4,096 in all), registered in Czechia. Services from NETX NetX Networks a.s. are reached through these addresses.

What it means to see AS204860 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS204860. That means the other end sits on the NETX NetX Networks a.s. network (Czechia). 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.