AS12406: the BN-AS Belarussian data communication service provider. network

AS12406 is an internet Autonomous System operated by BN-AS Belarussian data communication service provider. (BY). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS12406?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS12406 was assigned to BN-AS Belarussian data communication service provider. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS12406 currently announces 15 IPv4 block(s), totaling about 20.5 thousand addresses (20,480 in all), registered in BY. Services from BN-AS Belarussian data communication service provider. are reached through these addresses.

What it means to see AS12406 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS12406. That means the other end sits on the BN-AS Belarussian data communication service provider. network (BY). 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.