AS23620: the DMM DMM.com LLC network

AS23620 is an internet Autonomous System operated by DMM DMM.com LLC (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS23620?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS23620 was assigned to DMM DMM.com LLC by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS23620 currently announces 6 IPv4 block(s), totaling about 15.4 thousand addresses (15,360 in all), registered in Japan. Services from DMM DMM.com LLC are reached through these addresses.

What it means to see AS23620 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS23620. That means the other end sits on the DMM DMM.com LLC 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.