AS270943: the FIBINET NETWORKS TELECOMUNICACOES LTDA network

AS270943 is an internet Autonomous System operated by FIBINET NETWORKS 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 AS270943?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS270943 was assigned to FIBINET NETWORKS TELECOMUNICACOES LTDA by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS270943 currently announces 1 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in Brazil. Services from FIBINET NETWORKS TELECOMUNICACOES LTDA are reached through these addresses.

What it means to see AS270943 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS270943. That means the other end sits on the FIBINET NETWORKS 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.