AS270409: the MARCIO ISAIAS DA SILVA EIRELI network

AS270409 is an internet Autonomous System operated by MARCIO ISAIAS DA SILVA EIRELI (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS270409?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS270409 was assigned to MARCIO ISAIAS DA SILVA EIRELI by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS270409 currently announces 1 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in Brazil. Services from MARCIO ISAIAS DA SILVA EIRELI are reached through these addresses.

What it means to see AS270409 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS270409. That means the other end sits on the MARCIO ISAIAS DA SILVA EIRELI 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.