AS203742: the CSHRUB network
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Testar grátis 14 dias →AS203742 is an internet Autonomous System operated by CSHRUB (Poland). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS203742?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS203742 was assigned to CSHRUB by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS203742 currently announces 2 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in Poland. Services from CSHRUB are reached through these addresses.
What it means to see AS203742 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS203742. That means the other end sits on the CSHRUB 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 AS203742?
AS203742 is assigned to CSHRUB, 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 AS203742 control?
AS203742 currently announces about 1 thousand routed IPv4 addresses.