AS263261: the TRIBUNAL REGIONAL DO TRABALHO DA 3A REGIAO network

AS263261 is an internet Autonomous System operated by TRIBUNAL REGIONAL DO TRABALHO DA 3A REGIAO (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS263261?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS263261 was assigned to TRIBUNAL REGIONAL DO TRABALHO DA 3A REGIAO by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS263261 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in Brazil. Services from TRIBUNAL REGIONAL DO TRABALHO DA 3A REGIAO are reached through these addresses.

What it means to see AS263261 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS263261. That means the other end sits on the TRIBUNAL REGIONAL DO TRABALHO DA 3A 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.