AS25623: the CISN2 network
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Testar grátis 14 dias →AS25623 is an internet Autonomous System operated by CISN2 (the United States). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS25623?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS25623 was assigned to CISN2 by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS25623 currently announces 4 IPv4 block(s), totaling about 1 thousand addresses (1,024 in all), registered in the United States. Services from CISN2 are reached through these addresses.
What it means to see AS25623 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS25623. That means the other end sits on the CISN2 network (the United States). 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 AS25623?
AS25623 is assigned to CISN2, registered in the United States.
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 AS25623 control?
AS25623 currently announces about 1 thousand routed IPv4 addresses.