AS10021: the KVH KVH Co.,Ltd network

AS10021 is an internet Autonomous System operated by KVH KVH Co.,Ltd (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS10021?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS10021 was assigned to KVH KVH Co.,Ltd by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS10021 currently announces 21 IPv4 block(s), totaling about 110.8 thousand addresses (110,848 in all), registered in Japan. Services from KVH KVH Co.,Ltd are reached through these addresses.

What it means to see AS10021 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS10021. That means the other end sits on the KVH KVH Co.,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.