AS4673: the INTERVIA NTT DATA CORPORATION network

AS4673 is an internet Autonomous System operated by INTERVIA NTT DATA CORPORATION (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS4673?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS4673 was assigned to INTERVIA NTT DATA CORPORATION by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS4673 currently announces 18 IPv4 block(s), totaling about 241.7 thousand addresses (241,664 in all), registered in Japan. Services from INTERVIA NTT DATA CORPORATION are reached through these addresses.

What it means to see AS4673 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS4673. That means the other end sits on the INTERVIA NTT DATA 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.