AS52991: the Tres Pontas Internet Ltda network

AS52991 is an internet Autonomous System operated by Tres Pontas Internet Ltda (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS52991?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS52991 was assigned to Tres Pontas Internet Ltda by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS52991 currently announces 2 IPv4 block(s), totaling about 12.3 thousand addresses (12,288 in all), registered in Brazil. Services from Tres Pontas Internet Ltda are reached through these addresses.

What it means to see AS52991 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS52991. That means the other end sits on the Tres Pontas Internet Ltda 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.