AS203646: the ENERGI-FYN network
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Testar grátis 14 dias →AS203646 is an internet Autonomous System operated by ENERGI-FYN (Denmark). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS203646?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS203646 was assigned to ENERGI-FYN by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS203646 currently announces 2 IPv4 block(s), totaling about 3.1 thousand addresses (3,072 in all), registered in Denmark. Services from ENERGI-FYN are reached through these addresses.
What it means to see AS203646 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS203646. That means the other end sits on the ENERGI-FYN network (Denmark). 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 AS203646?
AS203646 is assigned to ENERGI-FYN, registered in Denmark.
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 AS203646 control?
AS203646 currently announces about 3.1 thousand routed IPv4 addresses.