AS52915: the Usina Sao Jose da Estiva SA network

AS52915 is an internet Autonomous System operated by Usina Sao Jose da Estiva SA (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS52915?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS52915 was assigned to Usina Sao Jose da Estiva SA by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS52915 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in Brazil. Services from Usina Sao Jose da Estiva SA are reached through these addresses.

What it means to see AS52915 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS52915. That means the other end sits on the Usina Sao Jose da Estiva SA network (Brazil). 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.