AS25308: the CITYLAN-AS network
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Testar grátis 14 dias →AS25308 is an internet Autonomous System operated by CITYLAN-AS (Russia). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS25308?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS25308 was assigned to CITYLAN-AS by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS25308 currently announces 17 IPv4 block(s), totaling about 8.2 thousand addresses (8,192 in all), registered in Russia. Services from CITYLAN-AS are reached through these addresses.
What it means to see AS25308 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS25308. That means the other end sits on the CITYLAN-AS network (Russia). 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 AS25308?
AS25308 is assigned to CITYLAN-AS, registered in Russia.
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 AS25308 control?
AS25308 currently announces about 8.2 thousand routed IPv4 addresses.