AS11993: the BANCO DO BRASIL S.A. network

AS11993 is an internet Autonomous System operated by BANCO DO BRASIL S.A. (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS11993?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS11993 was assigned to BANCO DO BRASIL S.A. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS11993 currently announces 12 IPv4 block(s), totaling about 68.4 thousand addresses (68,352 in all), registered in Brazil. Services from BANCO DO BRASIL S.A. are reached through these addresses.

What it means to see AS11993 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS11993. That means the other end sits on the BANCO DO BRASIL S.A. 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.