AS7539: the TWAREN-TW National Center for High-performance Computing network

AS7539 is an internet Autonomous System operated by TWAREN-TW National Center for High-performance Computing (Taiwan). Here is what that means and why this number may show up when you investigate a connection on your network.

What is AS7539?

An Autonomous System (ASN) is a block of networks under a single control with its own routing policy on the internet. The number AS7539 was assigned to TWAREN-TW National Center for High-performance Computing by an RIR (regional internet registry). All traffic entering or leaving that network is announced under this number.

Reach on the internet

AS7539 currently announces 10 IPv4 block(s), totaling about 85.5 thousand addresses (85,504 in all), registered in Taiwan. Services from TWAREN-TW National Center for High-performance Computing are reached through these addresses.

What it means to see AS7539 on your network

When you investigate where a connection from your computer or phone comes from (or goes to), you may find AS7539. That means the other end sits on the TWAREN-TW National Center for High-performance Computing network (Taiwan). 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.