AS266373: the Justica Federal de Primeiro Grau em Santa Catarina network

AS266373 is an internet Autonomous System operated by Justica Federal de Primeiro Grau em Santa Catarina (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS266373?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS266373 was assigned to Justica Federal de Primeiro Grau em Santa Catarina by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS266373 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in Brazil. Services from Justica Federal de Primeiro Grau em Santa Catarina are reached through these addresses.

What it means to see AS266373 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS266373. That means the other end sits on the Justica Federal de Primeiro Grau em Santa Catarina 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.