AS51691: the FSOL-AS network
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Testar grátis 14 dias →AS51691 is an internet Autonomous System operated by FSOL-AS (Finland). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS51691?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS51691 was assigned to FSOL-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS51691 currently announces 4 IPv4 block(s), totaling about 4.6 thousand addresses (4,608 in all), registered in Finland. Services from FSOL-AS are reached through these addresses.
What it means to see AS51691 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS51691. That means the other end sits on the FSOL-AS network (Finland). 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 AS51691?
AS51691 is assigned to FSOL-AS, registered in Finland.
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 AS51691 control?
AS51691 currently announces about 4.6 thousand routed IPv4 addresses.