AS266432: the Tribunal Regional Federal da 4a Regiao network

AS266432 is an internet Autonomous System operated by Tribunal Regional Federal da 4a Regiao (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS266432?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS266432 was assigned to Tribunal Regional Federal da 4a Regiao by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS266432 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in Brazil. Services from Tribunal Regional Federal da 4a Regiao are reached through these addresses.

What it means to see AS266432 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS266432. That means the other end sits on the Tribunal Regional Federal da 4a Regiao 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.