AS31313: the STS Bucharest, 323A Splaiul Independentei,Sector 6,060044,Romania network

AS31313 is an internet Autonomous System operated by STS Bucharest, 323A Splaiul Independentei,Sector 6,060044,Romania (Romania). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS31313?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS31313 was assigned to STS Bucharest, 323A Splaiul Independentei,Sector 6,060044,Romania by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS31313 currently announces 41 IPv4 block(s), totaling about 51.5 thousand addresses (51,456 in all), registered in Romania. Services from STS Bucharest, 323A Splaiul Independentei,Sector 6,060044,Romania are reached through these addresses.

What it means to see AS31313 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS31313. That means the other end sits on the STS Bucharest, 323A Splaiul Independentei,Sector 6,060044,Romania network (Romania). 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.