AS20166: the 1FBUSA-1 network
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Testar grátis 14 dias →AS20166 is an internet Autonomous System operated by 1FBUSA-1 (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 AS20166?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS20166 was assigned to 1FBUSA-1 by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS20166 currently announces 1 IPv4 block(s), totaling 256 addresses (256 in all), registered in the United States. Services from 1FBUSA-1 are reached through these addresses.
What it means to see AS20166 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS20166. That means the other end sits on the 1FBUSA-1 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 AS20166?
AS20166 is assigned to 1FBUSA-1, 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 AS20166 control?
AS20166 currently announces 256 routed IPv4 addresses.