AS59127: the NCV Newmedia Corporation network

AS59127 is an internet Autonomous System operated by NCV Newmedia Corporation (Japan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS59127?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS59127 was assigned to NCV Newmedia Corporation by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS59127 currently announces 10 IPv4 block(s), totaling about 63.5 thousand addresses (63,488 in all), registered in Japan. Services from NCV Newmedia Corporation are reached through these addresses.

What it means to see AS59127 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS59127. That means the other end sits on the NCV Newmedia 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.