AS57239: the NOBO_QUALITY network
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Testar grátis 14 dias →AS57239 is an internet Autonomous System operated by NOBO_QUALITY (Poland). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS57239?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS57239 was assigned to NOBO_QUALITY by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS57239 currently announces 2 IPv4 block(s), totaling 512 addresses (512 in all), registered in Poland. Services from NOBO_QUALITY are reached through these addresses.
What it means to see AS57239 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS57239. That means the other end sits on the NOBO_QUALITY network (Poland). 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 AS57239?
AS57239 is assigned to NOBO_QUALITY, registered in Poland.
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 AS57239 control?
AS57239 currently announces 512 routed IPv4 addresses.