AS263651: the Rede Brasil Fibra network

AS263651 is an internet Autonomous System operated by Rede Brasil Fibra (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS263651?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS263651 was assigned to Rede Brasil Fibra by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS263651 currently announces 2 IPv4 block(s), totaling about 2 thousand addresses (2,048 in all), registered in Brazil. Services from Rede Brasil Fibra are reached through these addresses.

What it means to see AS263651 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS263651. That means the other end sits on the Rede Brasil Fibra 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.