AS2043: the CIS-NET network
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Testar grátis 14 dias →AS2043 is an internet Autonomous System operated by CIS-NET (the Netherlands). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS2043?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS2043 was assigned to CIS-NET by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS2043 currently announces 1 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in the Netherlands. Services from CIS-NET are reached through these addresses.
What it means to see AS2043 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS2043. That means the other end sits on the CIS-NET network (the Netherlands). 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 AS2043?
AS2043 is assigned to CIS-NET, registered in the Netherlands.
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 AS2043 control?
AS2043 currently announces about 1 thousand routed IPv4 addresses.