AS270920: the ASSOCIADOS FERREIRA TELECOMUNICACOES LTDA network

AS270920 is an internet Autonomous System operated by ASSOCIADOS FERREIRA TELECOMUNICACOES LTDA (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS270920?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS270920 was assigned to ASSOCIADOS FERREIRA TELECOMUNICACOES LTDA by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS270920 currently announces 1 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in Brazil. Services from ASSOCIADOS FERREIRA TELECOMUNICACOES LTDA are reached through these addresses.

What it means to see AS270920 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS270920. That means the other end sits on the ASSOCIADOS FERREIRA TELECOMUNICACOES 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.