AS266637: the AGENCIA DE TECNOLOGIA DA INFORMACAO network

AS266637 is an internet Autonomous System operated by AGENCIA DE TECNOLOGIA DA INFORMACAO (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS266637?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS266637 was assigned to AGENCIA DE TECNOLOGIA DA INFORMACAO by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS266637 currently announces 1 IPv4 block(s), totaling 512 addresses (512 in all), registered in Brazil. Services from AGENCIA DE TECNOLOGIA DA INFORMACAO are reached through these addresses.

What it means to see AS266637 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS266637. That means the other end sits on the AGENCIA DE TECNOLOGIA DA INFORMACAO 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.