AS59959: the SFERIA network
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Testar grátis 14 dias →AS59959 is an internet Autonomous System operated by SFERIA (Czechia). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS59959?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS59959 was assigned to SFERIA by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS59959 currently announces 4 IPv4 block(s), totaling about 4.1 thousand addresses (4,096 in all), registered in Czechia. Services from SFERIA are reached through these addresses.
What it means to see AS59959 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS59959. That means the other end sits on the SFERIA network (Czechia). 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 AS59959?
AS59959 is assigned to SFERIA, registered in Czechia.
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 AS59959 control?
AS59959 currently announces about 4.1 thousand routed IPv4 addresses.