AS4694: the IDCF IDC Frontier Inc. network

AS4694 is an internet Autonomous System operated by IDCF IDC Frontier Inc. (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS4694?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS4694 was assigned to IDCF IDC Frontier Inc. by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS4694 currently announces 124 IPv4 block(s), totaling about 1 million addresses (1,040,896 in all), registered in Japan. Services from IDCF IDC Frontier Inc. are reached through these addresses.

What it means to see AS4694 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS4694. That means the other end sits on the IDCF IDC Frontier 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.