AS399216: the PACIRA-ASN network

Equipe PC Monitor · Atualizado em 19/09/2026

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AS399216 is an internet Autonomous System operated by PACIRA-ASN (the United States). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS399216?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS399216 was assigned to PACIRA-ASN by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS399216 currently announces 1 IPv4 block(s), totaling 512 addresses (512 in all), registered in the United States. Services from PACIRA-ASN are reached through these addresses.

What it means to see AS399216 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS399216. That means the other end sits on the PACIRA-ASN network (the United States). 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 AS399216?

AS399216 is assigned to PACIRA-ASN, registered in the United States.

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 AS399216 control?

AS399216 currently announces 512 routed IPv4 addresses.

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