AS265240: the NET GUIBOR network

Equipe PC Monitor · Atualizado em 19/09/2026

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AS265240 is an internet Autonomous System operated by NET GUIBOR (Brazil). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS265240?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS265240 was assigned to NET GUIBOR by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS265240 currently announces 1 IPv4 block(s), totaling 768 addresses (768 in all), registered in Brazil. Services from NET GUIBOR are reached through these addresses.

What it means to see AS265240 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS265240. That means the other end sits on the NET GUIBOR 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.

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Perguntas frequentes

Who owns AS265240?

AS265240 is assigned to NET GUIBOR, registered in Brazil.

What is an ASN (Autonomous System)?

It is a unique number identifying a network with its own routing policy on the internet. RIRs (regional registries) assign these numbers to carriers, ISPs and companies.

How many IP addresses does AS265240 control?

AS265240 currently announces 768 routed IPv4 addresses.

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