AS22177: the Transit do Brasil SA network

AS22177 is an internet Autonomous System operated by Transit do Brasil SA (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS22177?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS22177 was assigned to Transit do Brasil SA by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS22177 currently announces 3 IPv4 block(s), totaling about 8.4 thousand addresses (8,448 in all), registered in Brazil. Services from Transit do Brasil SA are reached through these addresses.

What it means to see AS22177 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS22177. That means the other end sits on the Transit do Brasil SA 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.