AS138384: the RMNI-AS-AP Rakuten Mobile Network, Inc. network

AS138384 is an internet Autonomous System operated by RMNI-AS-AP Rakuten Mobile Network, Inc. (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS138384?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS138384 was assigned to RMNI-AS-AP Rakuten Mobile Network, Inc. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS138384 currently announces 24 IPv4 block(s), totaling about 420.9 thousand addresses (420,864 in all), registered in Japan. Services from RMNI-AS-AP Rakuten Mobile Network, Inc. are reached through these addresses.

What it means to see AS138384 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS138384. That means the other end sits on the RMNI-AS-AP Rakuten Mobile Network, Inc. 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.