AS10001: the MICSNET Mics Network Corporation network

AS10001 is an internet Autonomous System operated by MICSNET Mics Network Corporation (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS10001?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS10001 was assigned to MICSNET Mics Network Corporation by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS10001 currently announces 10 IPv4 block(s), totaling about 36.9 thousand addresses (36,864 in all), registered in Japan. Services from MICSNET Mics Network Corporation are reached through these addresses.

What it means to see AS10001 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS10001. That means the other end sits on the MICSNET Mics Network Corporation 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.