AS18139: the HISOL-CSV Hitachi Solutions, Ltd. network
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Testar grátis 14 dias →AS18139 is an internet Autonomous System operated by HISOL-CSV Hitachi Solutions, Ltd. (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.
What is AS18139?
An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS18139 was assigned to HISOL-CSV Hitachi Solutions, Ltd. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.
Reach on the internet
AS18139 currently announces 5 IPv4 block(s), totaling about 1.5 thousand addresses (1,536 in all), registered in Japan. Services from HISOL-CSV Hitachi Solutions, Ltd. are reached through these addresses.
What it means to see AS18139 on your network
When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS18139. That means the other end sits on the HISOL-CSV Hitachi Solutions, Ltd. network (Japan). 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 AS18139?
AS18139 is assigned to HISOL-CSV Hitachi Solutions, Ltd., registered in Japan.
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 AS18139 control?
AS18139 currently announces about 1.5 thousand routed IPv4 addresses.