AS34521: the ATOS-SK-AS network
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Testar grátis 14 dias →AS34521 is an internet Autonomous System operated by ATOS-SK-AS (Slovakia). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS34521?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS34521 was assigned to ATOS-SK-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS34521 currently announces 2 IPv4 block(s), totaling 512 addresses (512 in all), registered in Slovakia. Services from ATOS-SK-AS are reached through these addresses.
What it means to see AS34521 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS34521. That means the other end sits on the ATOS-SK-AS network (Slovakia). 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 AS34521?
AS34521 is assigned to ATOS-SK-AS, registered in Slovakia.
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 AS34521 control?
AS34521 currently announces 512 routed IPv4 addresses.